Una O'Connor was an Irish-born American actress who worked extensively in theatre before becoming a character actress in film and in television. She often portrayed comical wives, housekeepers and servants. In 2020, she was listed at number 19 on The Irish Times list of Ireland's greatest film actors.

Murder! is a 1930 British thriller film co-written and directed by Alfred Hitchcock and starring Herbert Marshall, Norah Baring and Edward Chapman. Written by Hitchcock, his wife Alma Reville and Walter C. Mycroft, it is based on the 1928 novel Enter Sir John by Clemence Dane and Helen Simpson. It was Hitchcock's third all-talkie film, after Blackmail (1929) and Juno and the Paycock (1930).