Planet 51 is an upcoming animated film about a human astronaut who lands on a planet thinking he’s the first to set foot on it. …only to immediately discover it already has life on it. Lots and lots of life! Little green people, with families and pets and barbecue grills. Unlike Battle for Terra, this film is a comedy – as you can see from the trailer below the break! The film, which will hit theaters November 20th, was created by Jorge Blanco and Joe Stillman, working together with Ilion Animation Studios, New Line Cinema, Sony Pictures Worldwide, and TriStar Pictures.