Poster for My Stepmother Is an Alien (1988)

Movie PG-13

My Stepmother Is an Alien (1988)

Dec 9, 1988 · 1h 48m

5.8/10 TMDB user score
629 votes on TMDB

She's gorgeous, and she's never been kissed. Needless to say, she's from another planet.

Trying to rescue her home planet from destruction, a gorgeous extraterrestrial named Celeste arrives on Earth and begins her scientific research. She woos quirky scientist Dr. Steve Mills, a widower with a young daughter. Before long, Celeste finds herself in love with Steve and her new life on Earth, where she experiences true intimacy for the first time. But when she loses sight of her mission, she begins to question where she belongs.

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Top cast

  • Dan Aykroyd Dan Aykroyd Steven Mills
  • Kim Basinger Kim Basinger Celeste Martin
  • Jon Lovitz Jon Lovitz Ron Mills
  • Alyson Hannigan Alyson Hannigan Jessie Mills
  • Joseph Maher Joseph Maher Lucas Budlong
  • Seth Green Seth Green Fred Glass
  • Ann Prentiss Ann Prentiss Bag (voice)
  • Wesley Mann Wesley Mann Grady
  • Tony Jay Tony Jay Council Chief
  • Peter Bromilow Peter Bromilow Second in Command
  • Nina Henderson Cashier
  • Harry Shearer Harry Shearer Carl Sagan (voice)
  • Adrian Sparks Adrian Sparks Dr. Morosini
  • Juliette Lewis Juliette Lewis Lexie
  • Tanya Fenmore Tanya Fenmore Ellen
  • Karen Haber Kristy

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