Monsters vs. Aliens is a 2009 American animated science fiction comedy film produced by DreamWorks Animation and distributed by Paramount Pictures. The film was directed by Conrad Vernon and Rob Letterman from a screenplay written by Letterman, Maya Forbes, Wally Wolodarsky, and the writing team of Jonathan Aibel and Glenn Berger based on a story by Vernon and Letterman. Featuring the voices of Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Kiefer Sutherland, Rainn Wilson, Paul Rudd, and Stephen Colbert, the film involves a group of misfit monsters hired by the United States Armed Forces to stop the invasion of an extraterrestrial villain and save the world in exchange for freedom.

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