Colin O'Donoghue

Douxie (voice)

David Bradley

Merlin (voice)

James Faulkner

King Arthur / Green Knight (voice)

Emile Hirsch

Jim (voice)

Lexi Medrano

Claire (voice)

Alfred Molina

Archie (voice)

Steven Yeun

Steve (voice)

Steve Alterman

Additional Voices

Kelsey Grammer

Blinky (voice)

Angel Lin

Nari (voice)

John Rhys-Davies

Galahad / Old Galahad (voice)

Fred Tatasciore

AAARRRGGHH!!! / Additional Voices

Rupert Penry-Jones

Sir Lancelot / Lancelot (voice)

Lena Headey

Morgana (voice)

Stephanie Beatriz

Callista / Nimue / Lady of the Lake

Clancy Brown

Gunmar (voice)

Paula J. Newman

Additional Voices

Kay Bess

Bellroc (voice)

Piotr Michael

Skrael / Bellroc / Additional Voices