Simon Wells is the director of Disney's Mars Needs Moms. Wells started his career as supervising animator for Robert Zemeckis's Who Framed Roger Rabbit?. He later contributed with Zemeckis on Back to the Future Part II, and Back to the Future Part III. The Time Machine, An American Tail: Fievel Goes West, The Polar Express, Kung Fu Panda, and The Prince of Egypt are just some of the titles that Wells has been involved with.