Mary Kathleen O'Malley was an American film and television actress, who was the daughter of vaudevillian and actor Pat O'Malley. Her screen debut came during the silent film era as a thirteen month old baby in 1926, when she appeared alongside her father and her sister Sheila in the western My Old Dutch.

Lady on a Train is a 1945 American light-hearted comedy crime film noir directed by Charles David and starring Deanna Durbin, Ralph Bellamy, and David Bruce.