Occupation: Photographer
Place of Meeting: Photoshoot
Year Relationship began: 1945
Type of Relationship: Relationship
 

Andre De Dienes was one of the best stills photographers that Marilyn worked with in her career.  Many of his shots circa 1945-1949 are the most exquisite documentation of early Marilyn Monroe.

On an extended photoshoot which took him and Marilyn to Vegas, Oregon, the Mojave, and Yosemite, Andre fell in love with the then Norma Jeane.  According to de Dienes, the couple planned to get married and, in order to be with him in New York, Norma Jeane planned to move east to study law at Columbia University.  However, once back in Hollywood, Norma Jeane broke off the engagement.  De Dienes was understandably furious.  

Occupation: Screenwriter
Place of Meeting: 20th Century Fox
Year Relationship began: 1955
Type of Relationship: Marriage

Arthur Miller first met Marilyn in 1950 on the set of the 20th Century Fox film As Young as You Feel where she was shooting her role as a secretary.  Reportedly for Marilyn, it was love at first sight.  

It was not until May 1955 that Miller and Marilyn got together again after she had divorced Joe DiMaggio and moved from Hollywood to New York. The couple secretly dated and In 1956 they were married in two ceremonies, one civil and one Jewish, on June 29th and July 1st, respectively.  

"We're so congenial, This is the first time I've been really in love. Arthur is a serious man, but he has a wonderful sense of humour. We laugh and joke a lot.  I'm mad about him" Marilyn Monroe, circa 1956

Occupation: Actor
Place of Meeting: 20th Century Fox
Year Relationship began: 1946
Type of Relationship: Romance

By the time Ben Lyon met Norma Jeane he had been a star in his own right for nearly 20 years. They met in 1946 at 20th Century Fox where he was then a casting director. He gave Norma Jeane her first movie screen test and signed her to her first motion picture studio contract.  He is known as the man who 'discovered' Marilyn Monroe. 

Allegedly, there was more to the Lyon/Monroe relationship - according to writer Sheilah Graham, Lyon had been sleeping with Marilyn and promising to further her career.

Years after Marilyn had become a fully-fledged star, she sent Lyon an autographed photo of herself.  The inscription read: "You found me, named me and believed in me when no one else did. My love and thanks forever."

Occupation: Costume Designer
Place of Meeting: Film Set
Year Relationship began: 1952
Type of Relationship: Romance

Billy Travilla was the man who costumed Marilyn in most of her movie hits including:  Don't Bother to Knock (1952), Monkey Business (1952), Gentlemen Prefer Blondes (1953), How to Marry a Millionaire (1953), River of No Return (1954), There's No Business Like Show Business (1954), The Seven Year Itch (1955), and Bus Stop (1956). 

Travilla admitted that he and Marilyn dated despite the fact that he had been married at the time: "She would make any guy feel like a king. She only looked at you. She never looked around at anyone else."

Travilla, who was one of Marilyn's personal fashion designers, once named her "the easiest person I ever worked with."

Occupation: Actor
Place of Meeting: filmset
Year Relationship began: 1947
Type of Relationship: Romance

It was rumoured that Marilyn had an affair with the legendary comedian's son, Charlie Jr, in 1947.  The 'romance' allegedly ended when Charlie caught Marilyn in bed with his brother Sydney.

Occupation: Photographer
Place of Meeting: Photoshoot
Year Relationship began: 1945
Type of Relationship: Romance

David Conover was an Army photographer for Hal Roach Studios in Culver City, California.  He was assigned to take photographs of women working to aid the war effort. It was at the Radio Plane Company where he spotted 18-year-old Norma Jeane Dougherty.  Unbeknownst to him, he took what were the first professional photos ever taken of Marilyn Monroe.  Conover's photos actually landed Marilyn her first magazine cover.  

According to Conover, he and Marilyn had a romance for a brief period.   

Occupation: Actor
Place of Meeting: Film Set
Year Relationship began: 1956
Type of Relationship: Romance

Edward G. Robinson, Jr son of Edward G. Robinson had bit parts in two films with Marilyn: Bus Stop (1956) and Some Like It Hot (1959).  It was rumoured that they had a brief romance.    

Occupation: Film and Stage Director
Place of Meeting: Film Set
Year Relationship began: 1950
Type of Relationship: Romance

Elia Kazan, one of the most prolific stage and screen directors of all time, met Marilyn in 1950. Allegedly, they had a brief affair.  At that time, Kazan had been married to playwright Molly Thatcher for over 18 years.  He was a good friend of Arthur Miller.

Occupation: Actor
Place of Meeting: 20th Century Fox
Year Relationship began: 1954
Type of Relationship: Relationship

"The most fascinating man I ever dated" Marilyn Monroe to Robert Slatzer

Not only did Marilyn date Frank Sinatra, according to several sources she wanted to marry him. 

Marilyn first met Frank in 1954 when 20th Century Fox cast them opposite one another in the ill-fated movie The Girl in the Pink Tights.  They began dating shortly afterwards following Marilyn's split from Joe DiMaggio.  In the mid 1950s, during her New York period, Marilyn continued to see Sinatra occasionally. In 1960-1961, following her split from Arthur Miller, Marilyn resumed her courtship with Frank and when she eventually settled into her Doheny Drive apartment, her neighbour was none other than Frank Sinatra.

Occupation: Vocal coach
Place of Meeting: Columbia Pictures
Year Relationship began: 1948
Type of Relationship: Relationship

When Marilyn was signed to Columbia Pictures in 1948 she was introduced to the studio's vocal coach Fred Karger.  

Over the years Marilyn frequently referred to Fred as her first love (as opposed to Jim Dougherty).  It was Fred who taught her to sing, who introduced her to fine literature and classical music, who took her to seaside dinners in Malibu, and to nightclubs on the Sunset Strip. He installed her in the safe, pleasant and inexpensive Hollywood Studio Club and arranged for her to have her two protruding front teeth cosmetically corrected. He also took her home to his mother.  Marilyn wanted to marry Fred, however he did not consider Marilyn to be appropriate wife and/or mother material.  He reportedly told Marilyn "You cry too easily. That's because your mind isn't developed.  Compared to your figure, it's embryonic"

However Marilyn was in love.  She purchased a $500 gold watch for Fred on credit and two years later, long after her relationship with Karger had ended, she was still making payments on the watch. 

Occupation: Entertainer
Place of Meeting: Party
Year Relationship began: 1948
Type of Relationship: Rumour

Georgie Jessel, who earned the nickname of 'Toastmaster General' for his frequent duties at the master of ceremonies at public events, met Marilyn at a party. She was a young starlet and he was in his 50s.  He was eager to pursue a relationship with her but she was not interested. The columnist Earl Wilson said: "Georgie said that he held out to [Marilyn] the lure of fine clothes and good contacts if she would - and she wouldn't"

Occupation: Vocal Coach
Place of Meeting: 20th Century Fox
Year Relationship began: 1954
Type of Relationship: Rumour

When Marilyn separated from Joe DiMaggio in the autumn of 1954, speculation was rife that the reason was because she was having an 'affair' with her vocal coach Hal Schaefer.  

In the July of that year, Schaefer tried to commit suicide by drinking a poisonous solution which contained typewriter-cleaning fluid.  Rumours about his affair with Marilyn went public after she visited him in the Santa Monica Hospital after his unsuccessful suicide attempt.  

Occupation: Writer
Place of Meeting: Unknown
Year Relationship began: 1958
Type of Relationship: Rumour

Hans Jorgen Lembourn, a Danish screenwriter, wrote a book called Diary of A Lover of Marilyn Monroe in which he claimed he spent 40 days and nights with Marilyn in the late 1950s.  The clearly exploitative book has had many people asking if any of it was actually true.  

Occupation: Dress Manufacturer
Place of Meeting: New York
Year Relationship began: 1959
Type of Relationship: Romance

Henry Rosenfeld was a legendary figure in the world of fashion who had founded a company during World War || with the premise that wealthy women could wear inexpensive clothes that would still be as chic as designer outfits.  

Rosenfeld apparently first met Marilyn in 1949 when she was in New York to promote Happy Love and they allegedly had an affair.  It was also rumoured that for several months Rosenfeld provided small sums for Marilyn Monroe Productions, a company Marilyn and Milton Greene set up in 1954.

Occupation: Film Director
Place of Meeting: Film Set
Year Relationship began: 1952
Type of Relationship: Romance

It was rumoured that during the production of Clash by Night (1952), RKO owner Hughes sent word to Marilyn that he wanted to see her. Hughes's wife, Terry Moore, later verified that he did give her a jewelled $500 brooch.  It was also reported that Marilyn once told her voice and drama coach, Natasha Lytess, that she and Hughes had a brief affair.

Occupation: Writer (columnist and author)
Place of Meeting: Restaurant
Year Relationship began: 1948
Type of Relationship: Romance

Marilyn and Bacon first met in 1948 at the old Naples Restaurant in Hollywood.  In 1977 Bacon wrote a 'kiss and tell' article entitled 'The Night I Made It with Marilyn Monroe' in which he claimed that he visited Marilyn while she was living at Joe Schenck's guest house in Los Angeles. 

Following Marilyn's death, a few eyebrows were raised as he claimed he was in Marilyn's Brentwood bedroom the morning of August 5th, 1962, while her lifeless body was still on the bed.

Occupation: President
Place of Meeting: Dinner Party
Year Relationship began: 1950
Type of Relationship: Relationship

The most famous moment in the affair between Kennedy and Marilyn would have been in May 1962 when she sang 'Happy Birthday' to him in Madison Square Garden.  

What isn't widely known is that as early as the early 1950s, Marilyn was allegedly having an affair with the then Senator Kennedy - an affair that reportedly lasted through Kennedy's presidency. 

There were rumours that Robert Kennedy was brought in to deflect Marilyn's attention away from his brother - also rumours that shortly before her death she was pregnant with his child.  It was presumed that Marilyn was too much of a risk to the Kennedy name and so was phased out of the president's life.  

Occupation: Marine
Place of Meeting: School
Year Relationship began: 1942
Type of Relationship: Marriage

“If I hadn't gone into the Merchant Marines during World War II, she would still be Mrs Dougherty today” -  Jim Dougherty on Marilyn Monroe People Magazine 1976.

Jim Dougherty met the then Norma Jeane at Van Nuys High School - at the time he was student body president, a football star and a member of the Maskers Drama club.  He also owned a car - a blue Ford coupe, in which he used to drive his neighbours Beebe Goddard and Norma Jeane to and from school. 

In December 1941 Jim took Norma to a company Christmas dance, by March 1942 they were going steady, and by May they were engaged.  She was just 16 years old at the time, and it has been speculated that she agreed to the marriage to avoid going back to an orphanage.   

They had a happy relationship, but when Jim decided to join the Merchant Marines things started to go wrong.  Norma Jeane began to model and began gaining introduction to all sorts of Hollywood types who were very different from the circle she was used to meeting as Mrs Dougherty.  It was an exciting world, enticing her away from her domestic life. By September 13, 1946, they were divorced.  

Occupation: Baseball player
Place of Meeting: Restaurant
Year Relationship began: 1952
Type of Relationship: Marriage

By the time Marilyn and Joe DiMaggio met, she was an actress on the rise and he was a living legend.  For 15 years he was the biggest star in baseball and by the time he retired in 1951 he was regarded as one of the greatest ever to have played the game.

Before he retired from baseball, a photo of Marilyn posing with Chicago White Sox players Joe Dobson and Gus Zernial caught his eye.  He asked a mutual friend to set him up with a date.  Marilyn, however, had little interest in baseball and believed he was too flashy for her. But she finally agreed to meet for a date at the Villa Nova Restaurant in Hollywood.  For the next year and a half, Joe and Marilyn were the hottest couple in Hollywood.  Their very public courtship was a story book romance.  By January 14, 1954 the two were married in a modest ceremony in San Francisco.  

However, Joe found Marilyn's Hollywood lifestyle hard to deal with despite his own fame.  He was used to being the centre of attention, but found his standing as a legendary sportsman was eclipsed by Marilyn's allure as an iconic screen sex siren.  The marriage lasted just nine months.  

However rocky the relationship was, it was never loveless and Joe appeared unable to let the relationship go. In 1960-61 the couple re-kindled their relationship for a while.  In the final months of her life Joe sent her a pair of his pyjamas so that she would have something to wear in bed as a reminder of him.  

When Marilyn was found dead on August 5, 1962, it was Joe who was there for her, and it was Joe who organised the funeral arrangements and refused to let it become a frenzied Hollywood media circus. Joe broke down at the funeral and told Marilyn one final time “I love you, I love you, I love you.” And it was Joe who ordered that a black vase filled with fresh roses 'twice a week forever' to be placed at Marilyn's crypt.

Occupation: Actor
Place of Meeting: Film Set
Year Relationship began: 1947
Type of Relationship: Rumour

John Carroll, who had a long acting career, in 1947 invited  the then struggling starlet Marilyn to live with him and his wife Lucille Ryman at their west Hollywood apartment.  It was rumoured during that time that he and Marilyn became lovers.  She reportedly asked his wife to divorce him so she could marry him instead.  However Carroll once told the writer Bob Slatzer: “The only thing I ever did with Marilyn was to try to teach her how to sing.”

Occupation: Agent
Place of Meeting: Racquet Club
Year Relationship began: 1949
Type of Relationship: Relationship

The man most credited with 'discovering' Marilyn Monroe first met her at a racquet club in Palm Springs in 1949. He was one of Hollywood's most powerful agents but Marilyn was at that time still in love with Fred Karger.  Hyde fell for Marilyn in a big way, and in time he became her agent/manager/advisor/confidant/teacher/ and mentor as well as her lover and friend.  He repeatedly begged Marilyn to marry him but she always turned him down saying that although she loved him, she was not in love with him.  Hyde left his wife and moved Marilyn into his new home in Beverly Hills, but she still refused his marriage overtures.  

Hyde was responsible for Marilyn landing parts in The Asphalt Jungle (1950) and All About Eve (1950), which was a major breakthrough for Marilyn and secured a new studio contract for her with 20th Century-Fox. 

Occupation: writer/producer
Place of Meeting: Mexico City
Year Relationship began: 1962
Type of Relationship: Romance

Marilyn met the Mexican film writer/producer in Mexico City during a furniture buying expedition.  According to Lena Pepitone, Marilyn's New York personal maid/wardrobe mistress, he and Marilyn had a brief affair. 

Occupation: Company Owner
Place of Meeting: 20th Century Fox
Year Relationship began: 1947
Type of Relationship: Rumour

“Get this straight: Mr Schenck and I were good friends.  I know the word around Hollywood was [that] I was Joe Schenck's girlfriend, but that's a lie.” Marilyn Monroe to Maurice Zolotow.

When Joseph Schenck met Marilyn, she was merely a contract player while he was the mogul who had established 20th Century Fox and was also the studio's head of production.  He was nearly 70 and she was 21 when he spotted her at the studio parking lot and asked his chauffeur to stop so he could speak to her. He invited her to his house for dinner, the first of many Marilyn attended at his Holmby Hills Mansion. Despite her repeated denials, Hollywood gossip was that she was 'Joe Schenck's girl'.

It was reported that Schenck engineered Marilyn's Columbia Pictures contract in 1948 which led to her first co-starring role in Ladies of the Chorus.  And when Marilyn subsequently returned to Fox, Joe was there to guard her interests. 

Occupation: Actor
Place of Meeting: 20th Century Fox
Year Relationship began: 1955
Type of Relationship: Rumour

Marilyn and Marlon Brando were the most famous actors and actresses of their generation.  They met at 20th Century Fox on the film set of Desiree in 1954.  According to several sources he and Marilyn had a romance in 1955 following the divorce from Joe DiMaggio and before her marriage to Arthur Miller.  In December of that year, Brando attended the premiere of The Rose Tattoo with Marilyn.  

The alleged affair with Brando reportedly came to an end when her relationship with Arthur Miller became public.  However the two remained friends that lasted until her death. As for Brando, he refuses to discuss Marilyn.  

Occupation: Musician
Place of Meeting: Film Set
Year Relationship began: 1955
Type of Relationship: Romance

Mel Torme was a successful musician, jazz vocalist and recording artist who also appeared in films such as Higher and Higher (1943), Good News (1947) and The Patsy (1964).

In the mid 1950's he and Marilyn were rumoured to be having an affair.  In his book It Wasn't All Velvet he claims that he took her for drive-through burgers, which they ate while they sat in his car for ages talking about everything.  He claimed that she told him she liked him because he made her laugh.

Occupation: TV Entertainer
Place of Meeting: Film Set
Year Relationship began: 1948
Type of Relationship: Romance

Milton Berle, a TV entertainer became known as 'Mr Television' and 'Uncle Miltie' for his popular TV series that ran from 1948 to 1956.

He and Marilyn first met on the film set of Ladies of the Chorus (1948). At that time, he was dating film star Adele Jergens but, according to Berle, he and Marilyn had a brief affair.  

“Marilyn was on the climb in Hollywood, but there was nothing cheap about her. She wasn't one of the starlets around town that you put one meal into and threw into the sack. Maybe she didn't know exactly who she was, but she knew she was worth something.  She had respect for herself. Marilyn was a lady.” From Milton Berle: An Autobiography

Occupation: Photographer
Place of Meeting: Party
Year Relationship began: 1955
Type of Relationship: Rumour

Milton H. Greene met Marilyn when he was shooting a cover story about her for Look magazine. They met at a party given by Gene Kelly and became instant friends.  

During the next year Marilyn married and divorced Joe DiMaggio, and Greene took it upon himself to 'rescue' her from Hollywood.  By the end of 1954, Marilyn and Greene had formed Marilyn Monroe Productions, Inc. with Greene resigning from his $50,000-a-year job at Look magazine to guide Marilyn's career.  

Marilyn moved into his Connecticut home which he shared with his wife Amy. While Greene was labelled Marilyn's 'Svengali,'  some felt that he and Marilyn were having an affair. Whether they were lovers or not, he was mainly responsible for the success of Bus Stop in 1956 as well as obtaining her role in The Prince and the Showgirl (1957).

It was too good to last. While shooting the movie Prince, Marilyn's relationship with Greene fell apart, with some blaming Arthur Miller for the rift. In the spring of 1957, Greene sold his stock for just $85,000 with Marilyn commenting: “My company was not set up merely to parcel out 49.6% of all my earnings to Mr Greene for seven years.”

Their business partnership and their friendship was over. Whatever Greene's ultimate designs on Marilyn were, there was no denying he was an outstanding photographer.  His camera captured some of the most striking and interesting photographs of Marilyn which showed a glimpse of the real woman behind the public image of an icon of the silver screen.

Occupation: Drama coach
Place of Meeting: Columbia Pictures
Year Relationship began: 1948
Type of Relationship: Romance

“She was a great teacher, but she got really jealous about the men I saw.  She thought she was my husband!” Marilyn Monroe on Natasha Lytess.

Marilyn met Natasha when she was assigned to a 6-month contract with Columbia pictures in April 1948.  She was asked to work with Marilyn on the production of Ladies of the Chorus (1948).  The two developed an intense relationship which lasted fully seven years, partly because Natasha was one of the very few people who was prepared to take Marilyn seriously. So important to Marilyn was their friendship that from 1952's movie Clash by Night, Marilyn refused to film a scene unless Natasha was present on the set. Increasingly, Marilyn became dependent upon Natasha.

Hollywood was intrigued when Marilyn moved into Natasha's home in West Hollywood on Harper Avenue to prepare for her role in Don't Bother to Knock (1952). Not only that, Marilyn apparently gave Natasha a car and fur coat and also got her on to the 20th Century Fox payroll.

Inevitably rumours spread in some Hollywood circles that Marilyn was involved in a lesbian affair with Natasha.  The alleged affair was later 'verified' by Marilyn's New York maid, Lena Pepitone. Whatever the truth, Natasha did not approve of Marilyn's involvements with men,  notably Joe DiMaggio.  As Marilyn's love for DiMaggio blossomed, her relationship with Natasha soured.  In 1956 Marilyn arranged for lawyers to send Natasha a telegram informing her that her services were no longer required.  

Occupation: Actor
Place of Meeting: Film set
Year Relationship began: 1952
Type of Relationship: Relationship

Marilyn met Nico Minardos on the set of Money Business, in the spring of 1952 he was some six years younger than herself.  He had recently arrived from Athens and was studying acting at the UCLA which had production classes at Twentieth Century Fox.  Marilyn asked a Greek friend of hers at Fox to introduce them and from there a relationship began.  It lasted 7 months and they kept in touch until her death ten years later.  

Occupation: Writer/reporter
Place of Meeting: 20th Century Fox
Year Relationship began: 1946
Type of Relationship: Marriage/relationship

Of all Marilyn's relationships throughout her life, none proved more controversial than the one with Robert Slatzer. 

Slatzer was a struggling fan-magazine reporter when he first met Marilyn in the summer of 1946 at 20th Century Fox at the reception room while she was waiting for an interview.  Slatzer's version of events is that he and the then Norma Jeane went on a date that evening and that he dated Marilyn for the next six years even during her romance with Joe DiMaggio.  He also claims that it was him, not DiMaggio who became Marilyn's second husband.  According to Slatzer, they secretly wed on October 4th, 1952, in Tijuana, Mexico.  The alleged marriage ended three days later through the coercion of Marilyn's boss at 20th Century Fox, Darryl F. Zanuck. 

After Marilyn's death, Slatzer tried to disprove that Marilyn's death was suicide.  He went on to write a book claiming that John F. Kennedy and his brother Bobby were both involved in a cover-up of the circumstances surrounding Marilyn's death.  

Occupation: Senatore 
Place of Meeting: Party
Year Relationship began: 1961
Type of Relationship: Relationship

“Bobby Kennedy promised to marry me” Marilyn Monroe to Bob Slatzer

According to Lawrence Guiles, author of Legend: The Life and Death of Marilyn Monroe, Marilyn met Robert F. Kennedy at one of actor Peter Lawford's Santa Monica dinner parties in 1961 and that the affair between the two took place in 1962 in the months before Marilyn's death. 

“She told me that she was seeing somebody, but she didn't want to burden me with the responsibility of knowing who it was, because he was well known.  So she was going to call him 'The General'” Joan Greenson 

What really happened at the scene of Marilyn's death is still unknown and hotly debated. However, Marilyn's housekeeper admitted in 1985 that Bobby Kennedy was at Marilyn's Brentwood home on the afternoon of her death. Kennedy also allegedly testified that he did indeed go to Marilyn's house on August 4th and that he was escorted by a doctor, who injected Marilyn with a tranquiliser to calm her down.  Some people have accused Kennedy of being responsible for Marilyn's 'murder' while others have accused him of a mere cover-up.  

Occupation: Entertainer
Place of Meeting: Unknown
Year Relationship began: 1954
Type of Relationship: Romance

Very little is known of the relationship between Sammy Davis Jr and Marilyn, but allegedly they had a romance between 1954 and 1955.  

Occupation: President of 20th Century Fox
Place of Meeting: Party
Year Relationship began: 1951
Type of Relationship: Rumour

 As the president of 20th Century Fox, Spyros Skouras was the person most responsible for Marilyn's success at Fox.  

Skouras started to take a special interest in Marilyn at the 20th Century Fox exhibitors' party in 1951. Not untypically, she arrived two hours late, but when she did so she quickly became centre of attention.  Skouras reportedly asked 'Who is that girl?!' However no one knew, as at that time she was just another decorative studio blonde. Skouras quickly saw how popular she was at the exhibitors' party and assumed the public would love her too.  He took her by the arm and sat her at the head of the table by his side.  After the party, the word went out that Marilyn was to be slotted into every Fox film that required a sexy blonde.  As a result, between 1951 and 1952, Marilyn appeared in no less than seven movies for 20th Century Fox.   

Rumours of an affair of course abounded, but these have been denied by both parties.  

Occupation: Actor
Place of Meeting: racquets club
Year Relationship began: 1947
Type of Relationship: Romance

Marilyn and Sydney used to play tennis together and on one occasion was invited to watch him in a play rehearsal directed by his famous father.  She had an affair with his brother Charles Chaplin Jr, but this affair ended when he caught Marilyn in bed with his brother Sydney.

Occupation: Actor
Place of Meeting: 20th Century Fox
Year Relationship began: 1946
Type of Relationship: Romance

The former lifeguard known as 'Muscle Beach' was also a contract player at 20th Century Fox in 1946 at the same time that Marilyn was under contract to that studio.  Allegedly the two had a brief romance. 

Occupation: Actor
Place of Meeting: Film Set
Year Relationship began: 1959
Type of Relationship: Romance

'Next to my husband [Miller], and along with Marlon Brando, I think Yves Montand is the most attractive man I've ever met' Marilyn Monroe

In 1959, Arthur Miller and Marilyn were having a hard time to find a suitable male lead for her upcoming film comedy Let's Make Love.  However, after going to a one-man show on Broadway played by Yves, she knew she had found just the man. As an established actor, but relatively unknown in the US,  Frenchman Montand jumped at the chance.  

During the filming of Let's Make Love he and his wife took up residency at the Beverly Hills hotel, adjacent to the suite occupied by the Millers.  As fate would have it, Arthur Miller and Montand's wife were soon required elsewhere and Marilyn and Montand were left alone.  Of course he claimed that she threw herself at him:

'Perhaps she had a schoolgirl crush. If she did, I'm sorry. But nothing will break up my marriage,' he said.

The scandal attached to Montand's affair with Marilyn eventually ended up hurting his career.