Monsters, Inc. is a 2001 American computer-animated comedy film directed by Pete Docter, produced by Pixar, and released by Walt Disney Pictures. John Lasseter and Andrew Stanton both served as executive producers. The film was co-directed by Lee Unkrich and David Silverman and stars the voices of John Goodman, Billy Crystal, Steve Buscemi, James Coburn and Jennifer Tilly.

The film centers on two monsters employed at the titular Monsters, Inc.: top scarer James P. "Sulley" Sullivan (John Goodman) and his one-eyed partner and best friend Mike Wazowski (Billy Crystal). Monsters, Inc. employees generate their city's power by targeting and scaring children, but they are themselves afraid that the children may contaminate them; when one child enters Monstropolis, Mike and Sulley must return her.

Its prequel, Monsters University, directed by Dan Scanlon, was released on June 21, 2013. More: en.wikipedia.org.