Monsters vs. Aliens is a 2009 American 3D computer-animated science fiction action-comedy film produced by DreamWorks Animation and distributed by Paramount Pictures. It was DreamWorks Animation's first feature film to be directly produced in a stereoscopic 3-D format instead of being converted into 3-D after completion, which added $15 million to the film's budget.
The film was scheduled for a May 2009 release, but the release date was moved to March 27, 2009. It was released on DVD and Blu-ray September 29, 2009, in North America. The film features the voices of Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Kiefer Sutherland, Rainn Wilson, Paul Rudd, and Stephen Colbert.