My Stepmother Is an Alien (1988)
Cast: Dan Aykroyd, Kim Basinger, Jon Lovitz, Alyson Hannigan, Joseph Maher
Dan Aykroyd, Kim Basinger, Jon Lovitz. An extraterrestrial spy intent on saving her planet from destruction pretends to be human and marries an astrophysicist, but her secret is discovered by her stepdaughter.
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