Jackie Vernon
Frosty the Snowman (voice)
Jimmy Durante
Narrator (voice)
Billy De Wolfe
Professor Hinkle (voice)
Paul Frees
Santa Claus / Traffic Cop / Additional Voices (voice)
June Foray
Teacher / Karen / Additional Voices (voice)
Suzanne Davidson
Karen (voice) (uncredited)
Greg Thomas
Karen's friends (voice) (uncredited)