Marilyn married Arthur Miller on June 29, 1956. She converted to Judaism. She had met him during the filming of "As Young As You Feel" in 1951. She was so happy with him and they tried to have children together. Marilyn had three miscarriages, because of her endometriosis. Miller wrote the screenplay for the movie "The Misfits". The filming caused many problems between Marilyn and Arthur and they separated on January 20, 1961.