A Double Life is a 1947 film noir film which tells the story of an actor whose personal life takes on the characters that he is portraying. When his wife leaves him and he begins to play Othello, he becomes a jealous homicidal madman. It stars Ronald Colman, Signe Hasso, Edmond O'Brien, Shelley Winters and Ray Collins.

The movie was written by Ruth Gordon and Garson Kanin and was directed by George Cukor.

It won Academy Awards for Best Actor in a Leading Role (Ronald Colman) and Best Music, Scoring of a Dramatic or Comedy Picture. It was nominated for Best Director and Best Writing, Original Screenplay.