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)