Lorne Greene

Grandfather (voice)

Sammy Davis Jr.

Head Ratte (voice)

Margery Grey

Heidi (voice)

Pamelyn Ferdin

Klara (voice)

Michael Bell

Willie (voice)

Peter Cullen

Gruffle (voice)

Roger DeWitt

Peter (voice)

Richard Erdman

Herr Sessman (voice)

Fritz Feld

Sebastian (voice)

Joan Gerber

Fräulein Rottenmeier (voice)

Virginia Gregg

Aunt Dete (voice)

Janet Waldo

Tinette (voice)

Frank Welker

Schnoddle/Hootie (voice)

Michael Winslow

Mountain (voice)

Sue Allen

Chorus (voice)

Robert Taylor