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My Stepmother Is an Alien (1988)

PG-13  |   |  Comedy, Romance, Sci-Fi  |  9 December 1988 (USA)
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Ratings: 5.2/10 from 20,216 users  
Reviews: 53 user | 15 critic

An alien is sent on a secret mission to Earth, where she appears as a gorgeous, attractive, and single lady. Her mission is to make contact with a rather nerdy young scientist, who's quite ... See full summary »


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Cast overview, first billed only:
Ann Prentiss ...
The Voice of Bag (voice)
Council Chief
Peter Bromilow ...
Second in Command
Nina Henderson ...
Carl Sagan (voice)
Dr. Morosini
Tanya Fenmore ...


An alien is sent on a secret mission to Earth, where she appears as a gorgeous, attractive, and single lady. Her mission is to make contact with a rather nerdy young scientist, who's quite overwhelmed by her attentions, and isn't aware of the connection between her arrival and his work. Written by Murray Chapman <>

Plot Summary | Add Synopsis


A million lightyears from home, she's found a husband, a stepdaughter and a dog. When she finds out about sex, she may just stay for weekend. See more »


Comedy | Romance | Sci-Fi


PG-13 | See all certifications »

Parents Guide:





Release Date:

9 December 1988 (USA)  »

Also Known As:

Mi novia es una extraterrestre  »

Filming Locations:


Box Office


$20,000,000 (estimated)


$13,854,000 (USA)

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.85 : 1
See  »

Did You Know?


The 25 January 1988 draft of the script credits Jerico as writer, with revisions by Frank Galati, Richard Benner, Susan Rice, Herschel Weingrod and Timothy Harris, Paul Rudnick, and Debra Frank and Carl Sautter, and a further rewrite by Jonathan Reynolds. Only four of the ten writers received screen credit. See more »


After Celeste starts the car by sticking her finger in the ignition, two crew members are briefly reflected in the back passenger side window as the car starts to pull away. See more »


[after a long & strange make out, both somewhat out of breath]
Steven Mills: I've never felt anything like that before.
Celeste Martin: Do I now have to eat the chocolate from Pennsylvania?
Steven Mills: [laughs; looks slightly confused] What?
See more »

Crazy Credits

The opening title scrolls across a backdrop of the galaxy. The end credits show Jessie playing basketball with her family, and Jon Lovitz on Celeste's spaceship, playing the piano surrounded by members of the 12th Navigational Command. See more »


References Popeye the Sailor (1933) See more »


One Good Lover
Written by Kristin Haas and Robert Massi
Performed by Siren
Courtesy of PolyGram Records, Inc.
See more »

Frequently Asked Questions

See more (Spoiler Alert!) »

User Reviews

Hey... it's not THAT bad! It was really kinda funny! =)
4 June 1999 | by (Southern California) – See all my reviews

I rather enjoyed this film! I actually thought that it was a crack-up! Okay, so it's not the funniest movie that was ever made. So what?! Not every comedy was written by Neil Simon or Woody Allen. Of course, the fact that I saw it when it was first released (more than 10 years ago) might have something to do with my enjoyment factor. The special effects, especially by today's standards, are pretty corny. But, all in all, it was enjoyable. And hey, after all, where else can you get to see T.V.'s Buffy the Vampire Slayer stars, Alyson Hannigan and Seth Green, when they first appeared as boyfriend and girlfriend, years before their television romance began?!

3 of 4 people found this review helpful.  Was this review helpful to you?

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