Dors' performance attracted interest in Hollywood. In February 1956 she guest starred on a TV special Bob Hope made in England.
In May 1956 Dors signed a contract with RKO to support George Gobel in I Married a Woman. She left Southampton on board the Queen Elizabeth for New York City and then to Hollywood.
In July 1956 Dors – through her company, Treasure Pictures – signed a contract with RKO Pictures to make three more movies, the first of which was to be The Unholy Wife (1957) with Steiger, which started filming in September. Her fee was a reported $75,000, with the other films to go up $25,000. Dors reportedly had an affair with Rod Steiger during the filming of The Unholy Wife. In October 1956, Hamilton started an affair with Raymond's estranged wife in London. In November, Dors announced she and Hamilton were separating. Dors later said "They tried getting me in the gas chamber again in Hollywood.. but [the film] wasn’t good. They edited it badly."
William Dozier of RKO announced Dors would star in Blondes Prefer Gentlemen with Eddie Fisher, but the film was never made. In August 1956 she announced she had signed a one-picture deal to appear in a Bob Hope movie. This never happened – nether did a project Robert Aldrich announced he wanted to make with Dors and Paul Douglas at UA, Potluck for Pomeroy.
Hamilton and Raymond arranged a Hollywood launch party at Raymond's house in August 1956, with a guest list that included Doris Day, Eddie Fisher, Zsa Zsa Gabor, Liberace, Lana Turner, Ginger Rogers, and John Wayne. After 30 minutes while lining up next to Raymond's pool with her US agent Louis Shurr and her dress designer Howard Shoup, all four, including Dors and Hamilton, were pushed into the pool after the party crowd and photographers surged forward. Hamilton emerged from the pool and hit the first photographer before he could be restrained. The headlines in the National Enquirer read: "Miss Dors Go Home – And Take Mr. Dors With You". Because of the resulting negative publicity, the couple failed to buy Lana Turner's house, settling into a rental property in Coldwater Canyon.