Jessalyn Gilsig
Kayley (voice)

Andrea Corr
Kayley (singing voice)

Cary Elwes
Garrett (voice)

Gary Oldman
Ruber (voice)

Eric Idle
Devon (voice)

Don Rickles
Cornwall (voice)

Jane Seymour
Juliana (voice)

Céline Dion
Juliana (singing voice)

Pierce Brosnan
King Arthur (voice)

Steve Perry
King Arthur (singing voice)

Bronson Pinchot
Grifin (voice)

Jaleel White
Bladebeak (voice)

Gabriel Byrne
Lionel (voice)

John Gielgud
Merlin (voice)

Frank Welker
Ayden (voice)

Jack Angel
Additional Voices (voice)

Sherry Lynn
Additional Voices (voice)

Mickie McGowan
Additional Voices (voice)