John Goodman character James 'Sulley' Sullivan (voice)
Billy Crystal character Mike Wazowski (voice)
Mary Gibbs character Mary 'Boo' (voice)
Steve Buscemi character Randall Boggs (voice)
James Coburn character Henry J. Waternoose III (voice)
Bob Peterson character Roz (voice)
John Ratzenberger character Yeti (voice)
Jennifer Tilly character Celia Mae (voice)
Frank Oz character Jeff Fungus (voice)
Daniel Gerson character Needleman / Smitty (voice)
Steve Susskind character Jerry Slugworth (voice)
Bonnie Hunt character Ms. Flint (voice)
Jeff Pidgeon character Thaddeus 'Phlegm' Bile (voice)
Samuel Lord Black character George Sanderson (voice)
Jack Angel character Additional Voices (voice) (uncredited)
Bob Bergen character Additional Voices (voice) (uncredited)
Rodger Bumpass character Additional Voices (voice) (uncredited)
Gino Conforti character Additional Voices (voice) (uncredited)
Jennifer Darling character Additional Voices (voice) (uncredited)
Patti Deutsch character Additional Voices (voice) (uncredited)
Pete Docter character Additional Voices (voice) (uncredited)
Bobby Edner character Additional Voices (voice) (uncredited)
Ashley Edner character Additional Voices (voice) (uncredited)
Paul Eiding character Additional Voices (voice) (uncredited)
Katie Scarlettr character Additional Voices (voice) (uncredited)
Bill Farmer character Additional Voices (voice) (uncredited)
Keegan Farrell character Additional Voices (voice) (uncredited)
Pat Fraley character Additional Voices (voice) (uncredited)
Teresa Ganzel character Additional Voices (voice) (uncredited)
Taylor Gifaldi character Additional Voices (voice) (uncredited)
Marc John Jefferies character Additional Voices (voice) (uncredited)
Joe Lala character Additional Voices (voice) (uncredited)
Noah Luke character Additional Voices (voice) (uncredited)
Sherry Lynn character Additional Voices (voice) (uncredited)
Danny Mann character Additional Voices (voice) (uncredited)
Mona Marshall character Additional Voices (voice) (uncredited)
Mickie McGowan character Additional Voices (voice) (uncredited)
Laraine Newman character Additional Voices (voice) (uncredited)
Kay Panabaker character Additional Voices (voice) (uncredited)
Bret 'Brook' Parker character Trailer Mom (voice) (as Bret Parker) (uncredited)
Phil Proctor character Charlie (voice) (uncredited)
Josh Qualtieri character Additional Voices (voice) (uncredited)
Guido Quaroni character Additional Voices (voice) (uncredited)
Jan Rabson character Additional Voices (voice) (uncredited)
Lisa Raggio character Additional Voices (voice) (uncredited)
Joe Ranft character Pete "Claws" Ward (voice) (uncredited)
Sophia Ranft character Additional Voices (voice) (uncredited)
Katherine Ringgold character Additional Voices (voice) (uncredited)
Bob Scott character Additional Voices (voice) (uncredited)
David Silverman character Additional Voices (voice) (uncredited)
Jim Thornton character Additional Voices (voice) (uncredited)
Lee Unkrich character Additional Voices (voice) (uncredited)
Wallace Shawn character Rex (outtakes) (voice) (uncredited)