It Happened One Sunday is a 1944 British romantic comedy film directed by Karel Lamac and starring Robert Beatty, Barbara White, Marjorie Rhodes, Kathleen Harrison and Moore Marriott. An Irish servant girl working in Liverpool mistakenly believes that she has a secret admirer working at a hospital, and while seeking him out accidentally meets and falls in love with a serviceman there. She spends the rest of the day around Liverpool with him and they eventually decide to marry. The film was based on the play She Met Him One Sunday by Victor Skutezky.