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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 20,222 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


Man's closest encounter 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?


Shelley Long was originally cast as Celeste. See more »


When Celeste is at Ron's party after she first arrives on earth, she does some backflips. While she's doing that, her purse is stuck on her side, then the camera changes angles and her purse isn't on her at all. After she's done her backflips, her purse is back on her shoulder again. 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 »


Referenced in Robot Ninja (1989) See more »


Written by Prince
Performed by The Art of Noise and Tom Jones
Courtesy of China Records
See more »

Frequently Asked Questions

See more (Spoiler Alert!) »

User Reviews

Enjoyable light fluff
18 August 2002 | by (Ottawa, Canada) – See all my reviews

Ok, I admit to a guilty pleasure at 1)enjoying and 2) recommending this movie.

The plot is weak, the situation implausible and the secondary characters are weak. So why do I give this movie a 7/10?

Dan Aykroyd and Kim Basinger, who have some of the funniest lines in any movie.

They are both excellent as 'fish out of water' he as a nerdy social misfit and she as the space travelling investigator who has to find out how Dan Aykroyd's character was able to contact her planet from a primitive Earth.

It is a movie that definitely grows on you with repeated viewings.

15 of 19 people found this review helpful.  Was this review helpful to you?

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