Jeannie Carson
— Heidi
Natalie Wood
— Klara Sesseman
Richard Eastham
— Grandfather
Jo Van Fleet
— Aunt Dete
Wally Cox
— Peter
Robert Clary
— Eric Highlights
Elsa Lanchester
— Fräulein Rottenmeier
Bil Baird
— Puppets
Cora Baird
— Puppets
Claire Chatwin
— Second Maid
Philip Faversham
— Pastor
William Gibberson
— Herr Sesseman
Lee Goodman
— Sebastian
Eleanor Williams
— Tonette