Ken Marshall as Prince Colwyn

Lysette Anthony as Lyssa

Freddie Jones as Ynyr

Francesca Annis as Widow of the Web

Alun Armstrong as Torquil

David Battley as Ergo

Bernard Bresslaw as Cyclops

Liam Neeson as Kegan

John Welsh as Seer

Graham McGrath as Titch

Tony Church as Turold

Bernard Archard as Eirig

Belinda Mayne as Vella

Dicken Ashworth as Bardolph

Todd Carty as Oswyn

Robbie Coltrane as Rhun

Clare McIntyre as Merith

Bronco McLoughlin as Nennog

Andy Bradford as Darro

Gerard Naprous as Quain

Bill Weston as Menno

Lindsay Crouse as Princess Lyssa (voice) (uncredited)

Michael Elphick as Rhun (voice) (uncredited)

Derek Lyons as White Slayer with Tiger (uncredited)

Trevor Martin as The Beast (voice) (uncredited)

Dinny Powell as Slayer in the Swamp (uncredited)

Nosher Powell as Slayer in the Swamp (uncredited)

Tom Rumpf as Sword Fighter (uncredited)