Katy Kurtzman as Heidi

Burl Ives as Grandfather

Sean Marshall as Peter

John Gavin as Dan Wyler

Marlyn Mason as Mady

Sherrie Wills as Elizabeth Wyler

Alex Henteloff as Chef Andre

Charles Aidman as The Wild Man

Walter Brooke as Cousin Tobias

Amzie Strickland as Cousin Martha

Molly Dodd as Mother Gertrude

Adrienne Marden as Sister Agnes

Arlen Stuart as Hotel Telephone Operator

Barry Cahill as Hotel Manager Krebbs

Bartlett Robinson as Oscar the Butler

Fred Lerner as Jacob

Lola Mason as Birgitte

Buck Young as Jensen

Karl Ellis as Harold Sands

Kim Fowler as Marie (voice)