Catherine Zeta-Jones
Marina (voice)
Michelle Pfeiffer
Eris (voice)
Joseph Fiennes
Proteus (voice)
Dennis Haysbert
Kale (voice)
Timothy West
Dymas (voice)
Adriano Giannini
Rat (voice)
Jim Cummings
Luca / Additional Voices (voice)
Andrew Birch
Grum / Chum (voice)
Chris Miller
Tower Guard (voice)
Frank Welker
Spike (voice) (uncredited)