Monsters vs Aliens poster

Monsters vs Aliens

"Saving the day the monster way."

Movie PG 2009 1h 34m 6.2 /10
Directed by Conrad Vernon

On her wedding day, Susan Murphy is struck by a mysterious meteor and her body suddenly grows to nearly fifty feet tall. The military takes her into custody, renames her Ginormica, and houses her in a secret government facility alongside an eccentric group of so-called monsters, including a... Read more

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Streaming availability last verified: January 14, 2026

About Monsters vs Aliens

On her wedding day, Susan Murphy is struck by a mysterious meteor and her body suddenly grows to nearly fifty feet tall. The military takes her into custody, renames her Ginormica, and houses her in a secret government facility alongside an eccentric group of so-called monsters, including a gelatinous blob, a brilliant insect scientist, and a prehistoric amphibian. When an extraterrestrial threat appears, the authorities decide to use this odd team as an experimental defense. The film follows Susan as she adapts to an enormous new life, learns to relate to her unusual companions, and faces an escalating sci-fi showdown, all while keeping the story family-friendly and avoiding major plot spoilers.

Monsters vs Aliens was released by DreamWorks Animation in 2009 and directed by Conrad Vernon. The concept and screenplay were by Jonathan Aibel, Rob Letterman, and Maya Forbes, and the release emphasized the star voice cast and broad family appeal.

Financially, the film did well, drawing sizable audiences worldwide and helping DreamWorks' animation slate that year in 2009. It wasn't a niche project, but instead reached mainstream family viewers through wide distribution and strong marketing without relying on adult-only humor.

Characters like Ginormica, B.O.B., and Dr. Cockroach became familiar to kids, and the voice cast, including Reese Witherspoon and Seth Rogen, boosted the film's profile. Its affectionate send-up of classic monster movies and accessible visual gags helped the movie stick in pop culture, especially on home video and kids' programming.

Critical response was mixed to positive, reflected in an average user vote of 6.238/10 from 4,855 votes, which highlights appreciation for the animation and vocal performances. Themes include identity, acceptance and teamwork, wrapped in light satire of sci-fi tropes that keeps the tone humorous, family-oriented, and appealing to family audiences.

Details

Release Date
March 19, 2009
Runtime
1h 34m
Rating
PG
User Ratings
4,855 votes
Type
Movie
Genres
Animation, Family, Adventure, Science Fiction
Country
United States
Studio
DreamWorks Animation
External Links
View on IMDB

Official Trailer

Cast

Reese Witherspoon

Reese Witherspoon

Susan Murphy / Ginormica (voice)

Seth Rogen

Seth Rogen

B.O.B. (voice)

Hugh Laurie

Hugh Laurie

Dr. Cockroach Ph.D. (voice)

Rainn Wilson

Rainn Wilson

Gallaxhar (voice)

Will Arnett

Will Arnett

The Missing Link (voice)

Kiefer Sutherland

Kiefer Sutherland

General W.R. Monger (voice)

Paul Rudd

Paul Rudd

Derek Dietl (voice)

Stephen Colbert

Stephen Colbert

President Hathaway (voice)

Julie White

Julie White

Wendy Murphy (voice)

Jeffrey Tambor

Jeffrey Tambor

Carl Murphy (voice)

Director: Conrad Vernon

Written by: Jonathan Aibel, Rob Letterman, Maya Forbes

Frequently Asked Questions

Monsters vs Aliens is not currently available on streaming subscription services, but you can rent or buy it on Apple iTunes, Google Play, Vudu, and Amazon Video.

Yes, you can rent on Apple iTunes, Google Play, Vudu, and Amazon Video or buy on Apple iTunes, Google Play, Vudu, and Amazon Video.

With a rating of 6.2/10 from 4,855 viewers, Monsters vs Aliens is considered decent by viewers and may be worth checking out.

On her wedding day, Susan Murphy is struck by a mysterious meteor and her body suddenly grows to nearly fifty feet tall. The military takes her into custody, renames her Ginormica, and houses her in a secret government facility alongside an eccentric group of so-called monsters, including a gelat...

Monsters vs Aliens stars Reese Witherspoon, Seth Rogen, Hugh Laurie, Rainn Wilson, and Will Arnett.

Monsters vs Aliens was directed by Conrad Vernon.

Monsters vs Aliens was released on March 19, 2009.

Monsters vs Aliens is a Animation, Family, Adventure, and Science Fiction film.

Reese Witherspoon voices Susan Murphy, also known as Ginormica. On her wedding day she’s hit by a meteor, grows to 49-feet-11-inches, and is taken to a secret government compound to live with other monsters.

Seth Rogen voices B.O.B., a gelatinous, comic-relief monster who lives with the other creatures at the secret facility. He’s an oddball member of the team and provides a lot of the movie’s silly humor.

Monsters vs Aliens is rated PG, so it’s intended as a family movie and generally suitable for kids. It does include cartoon action, mild peril, and a few scary moments, so parental guidance is suggested for very young viewers.

Rainn Wilson voices Gallaxhar, the film’s alien antagonist. He represents the extraterrestrial threat the monsters must face and serves as the movie’s primary villain.