John Goodman as Sullivan (voice)

Billy Crystal as Mike (voice)

Mary Gibbs as Boo (voice)

Steve Buscemi as Randall (voice)

James Coburn as Waternoose (voice)

Jennifer Tilly as Celia (voice)

Bob Peterson as Roz (voice)

John Ratzenberger as Yeti (voice)

Frank Oz as Jeff Fungus (voice)

Daniel Gerson as Needleman / Smitty (voice)

Steve Susskind as Floor Manager (voice)

Bonnie Hunt as Flint (voice)

Jeff Pidgeon as Bile (voice)

Samuel Lord Black as George (voice)

Jack Angel as Additional Voices (voice)

Bob Bergen as Additional Voices (voice)

Rodger Bumpass as Additional Voices (voice)

Gino Conforti as Additional Voices (voice)

Jennifer Darling as Additional Voices (voice)

Patti Deutsch as Additional Voices (voice)

Pete Docter as Additional Voices (voice)

Bobby Edner as Additional Voices (voice)

Ashley Edner as Additional Voices (voice)

Katie Scarlett as Additional Voices (voice)

Paul Eiding as Additional Voices (voice)

Bill Farmer as Additional Voices (voice)

Keegan Farrell as Additional Voices (voice)

Pat Fraley as Additional Voices (voice)

Teresa Ganzel as Additional Voices (voice)

Taylor Gifaldi as Additional Voices (voice)

Marc John Jefferies as Additional Voices (voice)

Joe Lala as Additional Voices (voice)

Noah Luke as Additional Voices (voice)

Sherry Lynn as Additional Voices (voice)

Danny Mann as Additional Voices (voice)

Mona Marshall as Additional Voices (voice)

Mickie McGowan as Additional Voices (voice)

Laraine Newman as Additional Voices (voice)

Kay Panabaker as Additional Voices (voice)

Bret Parker as Additional Voices (voice)

Phil Proctor as Additional Voices (voice)

Josh Qualtieri as Additional Voices (voice)

Guido Quaroni as Additional Voices (voice)

Jan Rabson as Additional Voices (voice)

Lisa Raggio as Additional Voices (voice)

Joe Ranft as Additional Voices (voice)

Sophia Ranft as Additional Voices (voice)

Katherine Ringgold as Additional Voices (voice)

Bob Scott as Additional Voices (voice)

David Silverman as Additional Voices (voice)

Jim Thornton as Additional Voices (voice)

Lee Unkrich as Additional Voices (voice)

Wallace Shawn as Rex (voice) (uncredited)