Mr. Mustela (voice)

Lucky

Mort Rifkin

Vizzini

Mr. Crocus

Rex (voice)

Frank

Rex (voice)

Self

Dr. Derek

Albert

Principal Miller

David

Mr. Woodley (voice)

Kliegler

Self

Self (archive footage)

Gary

Mr. Willis

Gary the Gadget Guy (voice)

Harry

Rex (voice)

Eustace Bagge

Halvard Solness

Saul (voice)

Psychotherapist

Mr. Papadopoulos

Rex (Voice)

Self

Clarence

Gideon Rosen

Rex (voice)

Dr. Van Helsing

Rex (voice)

Rex (voice)

Sandy

Calico (voice)

Rex (voice)

Dr. Christian Burr (uncredited)

Booker / Broker / Lancealot Squarejaw

Broker / Booker / Lancelot Squarejaw

Self

Self

Mr. Gibbles (voice)

Mr. Gibson

Self

Baron Von Westphalen

Rex (voice) (archive footage)

Izzie's Teacher

Math Teacher (uncredited)

Self

Munk (voice)

Billy (voice)

Barnacle Paul (voice)

Self

Principal Fetchit (voice)

Clinic Doctor

Sy

Gilbert Huph (voice)

Principal Crosby Strickler (voice)

Ezra

Herman

Colonel Wilson

Mimir

Mr. Gelb

Rex (voice) (uncredited)

Self

George Bond

Gene

Rex (voice)

Rex (voice)

Coleye

Tarzan Chimp (voice)

Furnaceman

Arthur Blake

Marty

Self

Victor Finley

Labrador MC (voice)

Rex (voice)

Stan Spiegel

Mr. Wendell Hall

Echidna (voice)

Canadian Prime Minister Clark MacDonald

Cosmo

Boss Man (voice)

Principal Mazur (voice)

Vanya

Horatio Byrd

Mr. Little

Larry

Cashpot

Sibor, Semage's Beau

Doctor/Therapist

Everett Willits

Simon Carr

Howard

Translator

Dr. Fishbinder

Oiseau

Vizzini

John Lahr

Ellen

Masked Avenger

Henderson's Attorney

Mike Hoover

Father Abruzzi

Dr. Elliot Fibel

Professor Silverfish

Interviewer

Mr. Pardon

Freud

Turtle

Frank Judd

Harold DeVoto

Earl

Jules Goldfarb

Otto Jaffe

Oliver

Birthday Party Guest (uncredited)

Wallace "Wally" Shawn

Mugger

Waiter

Eric Van Dongen

Assistant Insurance Man

Workshop Member

Jeremiah