58 user 19 critic

My Stepmother Is an Alien (1988)

PG-13 | | Comedy, Sci-Fi | 9 December 1988 (USA)
0:30 | Trailer

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A creature from another planet tries to seduce a shy Earth physicist to gain control over his researches. The result of this important mission much exceeded her expectations.


Richard Benjamin


Jerico Stone (as Jerico), Herschel Weingrod | 2 more credits »
4 nominations. See more awards »





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


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 <muzzle@cs.uq.oz.au>

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 | Sci-Fi


PG-13 | See all certifications »

Parents Guide:

View content advisory »






Release Date:

9 December 1988 (USA) See more »

Also Known As:

Mi novia es una extraterrestre See more »


Box Office


$20,000,000 (estimated)

Gross USA:

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Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.85 : 1
See full technical specs »

Did You Know?


Dan Aykroyd also plays a widower in the movie 'My Girl' (1991). See more »


When they are in the electric room the first time, a crew member is visible on the floor. See more »


Alien leader: Earthmen will fall to their knees, betray their country and give away valuable real estate for a desirable woman.
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 Little Shop of Horrors (1986) See more »


Written by Prince
Performed by The Art of Noise and Tom Jones
Courtesy of China Records
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Frequently Asked Questions

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User Reviews

"Oh, Dr. Steve, that was sooo good."
9 March 2005 | by honkusSee all my reviews

This movie definitely falls under the "so bad it's funny" category. It is easily one of the most absurd Hollywood movies ever. Some of it almost feels like a Bugs Bunny cartoon starring SNL alums. The writer and director were either in the middle of a massive hallucinogen binge or had just gotten done watching like forty billion bad 1950s movies in a row.

Akroyd is mostly boring, but the look on his face when the ultra sexy Basinger puts the moves on him is priceless -- you can tell he's been in that situation before. The best acting in the movie probably comes from the dog, but as far as human actors go, Alyson Hannigan (the daughter) is an entertaining and refreshing break from the pouty, "my parents are so lame" cardboard cutouts found in most 80s and 90s comedies.

One of the funniest things I've ever seen comes at the party after the wedding. It lasts about a split second, but the band's keyboard player does the goofiest, most ridiculous 'pretending to make music' acting job ever.

Bottom line: the story and dialogue are so completely ludicrous that depending on how goofy a sense of humor you have, this will either be the worst or the funniest movie you'll ever see.

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