Dan Scanlon Director, Screenwriter Billy Crystal Mike Wazowski Voice John Goodman Sulley Voice Steve Buscemi Randy Boggs Voice Helen Mirren Dean Hardscrabble Voice Peter Sohn Scott "Squishy" Squibbles Voice Joel Murray Don Carlton Voice Sean Hayes Terri Perry Voice Dave Foley Terry Perry Voice Charlie Day Art Voice Alfred Molina Professor Knight Voice Tyler Labine Greek Council VP Brock Pearson Voice Nathan Fillion Johnny Voice Aubrey Plaza Greek Council President Claire Wheeler Voice Bobby Moynihan Chet Voice Noah Johnston Young Mike Voice Julia Sweeney Mrs. Squibbles Voice Bonnie Hunt Mrs. Graves Voice John Krasinski Frank McCay Voice Bill Hader Referee, Slug Voice Beth Behrs Carrie Voice Bob Peterson Roz Voice John Ratzenberger Yeti Voice Daniel Gerson Screenwriter Robert L. Baird Screenwriter Kori Rae Producer John Lasseter Executive Producer Pete Docter Executive Producer Andrew Stanton Executive Producer Lee Unkrich Executive Producer Matt Aspbury Cinematographer Jean-Claude Kalache Cinematographer Greg Snyder Film Editing Randy Newman Original Music Ricky Nierva Production Design Natalie Lyon Casting Kevin Reher Casting