Jim Henson

as Jen / High Priest, Ritual Master

Kathryn Mullen

as Kira, a Gelfling

Frank Oz

as Aughra, a Keeper of Secrets / Chamberlain

Dave Goelz

as Fizzgig, a Friendly Monster / General, Garthim Master

Steve Whitmire

as Scientist (voice)

Louise Gold

as Gourmand

Brian Meehl

as Ornamentalist / Urzah / Dying Master

Stephen Garlick

as Jen (voice)

Lisa Maxwell

as Kira (voice)

Billie Whitelaw

as Aughra (voice)

Percy Edwards

as Fizzgig (voice)

Barry Dennen

as Chamberlain / Podling (voice)

Deep Roy

as Additional Performer

Kiran Shah

as Additional Performer

Jack Purvis

as Additional Performer

Bob Payne

as Historian, Scroll Keeper

Michael Kilgarriff

as General (voice)

John Baddeley

as Historian (voice)

David Buck

as Slave Master (voice)

Charles Collingwood

as Treasurer (voice)

Sean Barrett

as Urzah (voice)

Miki Iveria

as Podling (voice)

Patrick Monckton

as Podling (voice)

Susan Westerby

as Podling (voice)

Joseph O'Conor

as Narrator / Urskeks (voice)

Thick Wilson

as Gourmand (voice)

Jerry Nelson

as High Priestess / Dying Emperor (voice)