Art Carney

Santa Claus / Cosmo Scam

Jim Henson

Fred / Lothar (voice)

Frank Oz

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

Jerry Nelson

Thog / Zippity / Snivelly (voice)

Danny Seagren

Gloat / Snarl / Snerf (voice)

John Lovelady

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

Richard Hunt

Bing / Match Frackle (voice)

Marilyn Sokol

Additional Muppet Performer (voice)

Fran Brill

Snerf (voice)

Byron Whiting

Additional Muppet Performer (voice)

Greg Antonacci

Additional Muppet Performer (voice)

Cary Antebi

Additional Muppet Performer (voice)

John Byrum

Additional Muppet Performer (voice)

Diane Kimbrell

Additional Muppets (voice) (uncredited)

Ed Sullivan

Self (uncredited)

John Moffitt