Thieves is a 1977 American comedy film directed by John Berry, written by Herb Gardner, and starring Marlo Thomas, Charles Grodin and Irwin Corey. It was released on February 11, 1977, by Paramount Pictures. The film was based on Gardner's Broadway play, and has almost the same cast, with the main exception being that Charles Grodin is playing Martin rather than Richard Mulligan, though Grodin directed and produced the play.

Margaret Julia Thomas is an American actress, producer, author, and social activist. She is best known for starring on the sitcom That Girl (1966–1971) and her children's franchise Free to Be... You and Me. She has received three Primetime Emmy Awards, a Daytime Emmy Award, a Golden Globe Award, a Peabody Award for her work in television and has been inducted into the Broadcasting and Cable Hall of Fame.