Mark Hamill as Simon Weir (voice)

Christopher Rodriguez Marquette as Jac Weir (voice)

Peri Gilpin as Caroline Weir (voice)

Kevin McDonald as Agent Po (voice)

Jonathan Taylor Thomas as Prince Ragis (voice)

Michael Dorn as King Tor (voice)

Dee Bradley Baker as Talking Head (voice)

Michael McShane as Hymo (voice)

John DiMaggio as Bodkus (voice)

John DeMita as Guard (voice)

Phil Proctor as Rebel (voice)

Jack Fletcher as Soldier (voice)

Michelle Ruff as Young Jac (voice)

Candi Milo as Additional Voices (voice)

Dave Wittenberg as Additional Voices (voice)

Lex Lang as Additional Voices (voice)

Richard Epcar as Additional Voices (voice)

Steve Blum as Additional Voices (voice)