James Arnold Taylor as Milo (voice)

Cree Summer as Kida (voice)

John Mahoney as Whitmore (voice)

Jacqueline Obradors as Audrey / Nurse (voice)

Don Novello as Vinny (voice)

Corey Burton as Mole (voice)

Phil Morris as Sweet (voice)

Florence Stanley as Packard (voice)

Steven Barr as Cookie (voice)

Frank Welker as Obby / Mantell (voice)

Clancy Brown as Volgud (voice)

Jean Gilpin as Inger (voice)

Kai Rune Larsen as Seaman / Gunnar (voice)

Bill Fagerbakke as Sven (voice)

Thomas F. Wilson as Carnaby (voice)

Jeff Bennett as Sam McKeane (voice)

William Morgan Sheppard as Erik Hellstrom (voice)