In 1955 Marilyn persued her goal of becoming a serious actress. In New York, she studied at the world famous Actor's Studio, under the tutelage of Lee Strasberg. She had left behind the glamour of Hollywood for a while, and focused on improving her acting ability.
In the summer of 1956, two things happened. Marilyn married playwright Arthur Miller, and her latest film, Bus Stop, was released. The Miller marriage would last longer than any other. Marilyn was also during this time period forming her own production company with longtime friend Milton Greene. Marilyn Monroe Productions would only make one film, 1957's The Prince and The Showgirl, filmed in London and co-starring the great British actor Sir Laurence Olivier.
While in London, Marilyn met the Queen. Marilyn tried throughout the Miller marriage to have children, and was disappointed by her miscarriages. She didn't make another film until the 1959 hit Some Like It Hot. This comedy was Marilyn's biggest hit; she won a Golden Globe Award for it.
The next year Marilyn made two more movies; Let's Make Love, with Yves Montand, and The Misfits, written by Arthur Miller with a part for Marilyn. The Miller marriage, however, was on its last legs. Marilyn's co-star on The Misfits, Clark Gable, died of a heart attack shortly after filming ended. When the gossip columns blamed Marilyn's lateness to the set of the film for his death, she was heart-broken. In early 1961, Marilyn and Arthur were divorced. Marilyn was on her own, and she would never complete another picture.