Art Carney

as Santa Claus / Cosmo Scam

Ed Sullivan

as Self / Host / Narrator (uncredited)

Jim Henson

as Fred / Lothar (voice)

Frank Oz

as Thig / Skippity / Hoppity / Boppity / Snerf (voice)

Jerry Nelson

as Thog / Zippity / Snivelly (voice)

Danny Seagren

as Gloat / Snarl / Snerf (voice)

John Lovelady

as Bong / Snake Frackle / Scoff / Snerf / Alarm Frackle (voice)

Richard Hunt

as Bing / Match Frackle (voice)

Marilyn Sokol

as Additional Muppet Performer (voice)

Fran Brill

as Snerf (voice)

Byron Whiting

as Additional Muppet Performer (voice)

Greg Antonacci

as Additional Muppet Performer (voice)

Cary Antebi

as Additional Muppet Performer (voice)

John Byrum

as Additional Muppet Performer (voice)

Diane Kimbrell

as Additional Muppets (voice) (uncredited)