The film began with the working title of "All Rights Reserved", The film's title was changed to ''Four's a Crowd'' in February. David Lewis, who produced, said the original story was bought to him by an agent friend of his, Dick Polimer. Lewis liked the story, and took it to Hal Walls' assistant, Walter MacEwen, who was enthusiastic. Lewis said that Hal Wallis "had little faith in the film, maybe because of me, but Warner liked the project" in part because the author had written
Libeled Lady.. Lewis said that Warner wanted to cast the Lane sisters and Jeffrey Lynn. Lewis said that Olivia de Havilland was keen to do it, as was Errol Flynn "as a change of pace". Patrick Knowles, also under contract to Warners, played the second male lead. Lewis wrote Knowles was "kept in reserve to keep the mercurial Errol in line... But Knowles was a pale image instead of a threat. Flynn was unique—attractive, dynamic, sexy, and a real throwback to the predatory male. I was enormously fond of him." "''Four's A Crowd
was a real “A” picture because of the casting," wrote Lewis. was also moved to Comet Over Broadway'' at the same time.
Edmund Goulding directly turned down directing it, before it was finally assigned to Michael Curtiz. ==Release==