Ami Foster

Kristi (voice)

Danny Cooksey

Crown Prince Bu (voice)

Vincent Price

King Ulvik (Right Head) / Kristi and Sonja's Father (voice)

Jonathan Winters

King Ulvik (Left Head) (voice)

Don Knotts

Professor Nidaros (voice)

Cloris Leachman

Queen Sirena (voice)

Charlie Adler

Stav (voice)

Michael Bell

Ribo / Krill (voice)

William Christopher

Bjørn (voice)

Laurie Faso

Prince Borch (Left Head) (voice)

Christina Lange

Sonja (voice)

Rob Paulsen

Prince Borch (Right Head) (voice)

Neil Ross

Prince Prag (Right Head) (voice)

B.J. Ward

Bjørn's Wife (voice)

Frank Welker

Prince Prag (Left Head) (voice)