Monsters, Inc. is a 2001 American computer-animated monster adventure comedy film produced by Pixar Animation Studios and distributed by Walt Disney Pictures. Featuring the voices of John Goodman, Billy Crystal, Steve Buscemi, James Coburn, Mary Gibbs and Jennifer Tilly, the film was directed by Pete Docter in his directorial debut, and executive produced by John Lasseter and Andrew Stanton. The film centers on two monsters—James P. "Sulley" Sullivan and his one-eyed partner and best friend Mike Wazowski—employed at the titular energy-producing factory Monsters, Inc., which generates power by scaring human children. However, the monster world believes that the children are toxic, and when one sneaks into the factory, Sulley and Mike must return her home before it is too late.
Docter began developing the film in 1996, and wrote the story with Jill Culton, Jeff Pidgeon and Ralph Eggleston. Stanton wrote the screenplay with screenwriter Daniel Gerson. The characters went through many incarnations over the film's five-year production process. The technical team and animators found new ways to simulate fur and cloth realistically for the film. Randy Newman, who composed the music for Pixar's three prior films, returned to compose for its fourth.
Upon its release on November 2, 2001, Monsters, Inc. received critical acclaim and was a commercial success, grossing over $577 million worldwide to become the third highest-grossing film of 2001. The film won the Academy Award for Best Original Song for "If I Didn't Have You" and was nominated for the first Best Animated Feature, but lost to DreamWorks' Shrek, and was also nominated for Best Original Score and Best Sound Editing. Monsters, Inc. saw a 3D re-release in theaters on December 19, 2012. A prequel titled Monsters University, which was directed by Dan Scanlon, was released on June 21, 2013. A television series/sequel titled Monsters at Work premiered on Disney+ on July 7, 2021.