Monsters vs. Aliens is a 2009 American computer-animated 3-D movie from DreamWorks Animation and Paramount Pictures. It was the first computer animated movie to be directly produced in a stereoscopic 3-D format instead of being changed into 3-D after completion, which added $15 million to the film's budget. The movie was set to release in May 2009, but was pulled back to March 27, 2009. It was released on DVD and Blu-ray September 29, 2009 in North America. It stars Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Conrad Vernon, Rainn Wilson, Kiefer Sutherland, Stephen Colbert and Paul Rudd.