 The screenplay was written by Joss Whedon, Andrew Stanton, Joel Cohen, and Alec Sokolow from a story by Lasseter, Stanton, Pete Docter, and Joe Ranft.The film features music by Randy Newman, was produced by Bonnie Arnold and Ralph Guggenheim, and was executive-produced by Steve Jobs and Edwin Catmull.It features the voices of Tom Hanks, Tim Allen, Don Rickles, Wallace Shawn, John Ratzenberger, Jim Varney, Annie Potts, R. Lee Ermey, John Morris, Laurie Metcalf, and Erik von Detten.