Art Carney
Santa Claus / Cosmo Scam
Ed Sullivan
Self / Host / Narrator (uncredited)
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)