Jim Henson

Kermit the Frog / Rowlf / Dr. Teeth / Waldorf / Doc Hopper's Men / Link Hogthrob / Swedish Chef (voice)

Frank Oz

Miss Piggy / Fozzie Bear / Animal / Sam the Eagle / Doc Hopper's Men / Marvin Suggs / Swedish Chef (hands) / Motorcycle Guy (voice)

Jerry Nelson

Floyd Pepper / Robin the Frog / Crazy Harry / Lew Zealand / Camilla / Dr. Bunsen Honeydew (assistant) (voice)

Richard Hunt

Scooter / Statler / Janice / Sweetums / Beaker / Fozzie Bear (assistant) (voice)

Dave Goelz

The Great Gonzo / Dr. Bunsen Honeydew / Zoot / Doglion / Iraqian in El Sleezo Cafe / Pig (voice)

Charles Durning

Doc Hopper

Austin Pendleton

Max

Edgar Bergen

Himself / Charlie McCarthy (voice)

Milton Berle

Mad Man Mooney

Mel Brooks

Professor Max Krassman

James Coburn

El Sleezo Cafe Owner

Dom DeLuise

Bernie the Agent