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)