My Stepmother Is an Alien is a 1988 American science fiction comedy film directed by Richard Benjamin. It stars Dan Aykroyd, Kim Basinger, Jon Lovitz, and Alyson Hannigan. The film follows the story of Celeste, an extraterrestrial woman who is sent on a secret mission to Earth, after her home planet's gravity is mistakenly disrupted by Steven Mills, a widowed scientist raising his daughter Jessie as a single father. The film was the film debut of Juliette Lewis.

Richard Samuel Benjamin is an American actor and film director. He has starred in a number of well-known films, including Goodbye, Columbus (1969), Catch-22 (1970), Portnoy's Complaint (1972), Westworld (1973), The Last of Sheila (1973), and The Sunshine Boys (1975), for which he won a Golden Globe Award for Best Supporting Actor – Motion Picture. Benjamin was nominated for an Emmy Award for Best Actor in a Comedy Series for his performances in He & She (1968), opposite his wife Paula Prentiss.