 | Jim Henson als Jen / High Priest, Ritual Master |
 | Kathryn Mullen als Kira, a Gelfling |
 | Frank Oz als Aughra, a Keeper of Secrets / Chamberlain |
 | Dave Goelz als Fizzgig, a Friendly Monster / General, Garthim Master |
 | Steve Whitmire als Scientist (voice) |
 | Louise Gold als Gourmand |
 | Brian Meehl als Ornamentalist / Urzah / Dying Master |
| Stephen Garlick als Jen (voice) |
 | Lisa Maxwell als Kira (voice) |
 | Billie Whitelaw als Aughra (voice) |
| Percy Edwards als Fizzgig (voice) |
 | Barry Dennen als Chamberlain / Podling (voice) |
 | Deep Roy als Additional Performer |
 | Kiran Shah als Additional Performer |
 | Jack Purvis als Additional Performer |
| Bob Payne als Historian, Scroll Keeper |
| Michael Kilgarriff als General (voice) |
| John Baddeley als Historian (voice) |
 | David Buck als Slave Master (voice) |
| Charles Collingwood als Treasurer (voice) |
 | Sean Barrett als Urzah (voice) |
 | Miki Iveria als Podling (voice) |
| Patrick Monckton als Podling (voice) |
| Susan Westerby als Podling (voice) |
 | Joseph O'Conor als Narrator / Urskeks (voice) |
| Thick Wilson als Gourmand (voice) |
 | Jerry Nelson als High Priestess / Dying Emperor (voice) |
| Jim Henson | Producer |
| Gary Kurtz | Producer |
| David Lazer | Executive Producer |
| David Odell | Screenplay |
| Jim Henson | Director |
| Frank Oz | Director |
| Ralph Kemplen | Editor |
| Oswald Morris | Director of Photography |
| Trevor Jones | Original Music Composer |
| Kiran Shah | Stunts |
| Nicholas Stevenson | Sound Editor |
| James Acheson | Special Effects |
| Brian Ackland-Snow | Art Direction |
| Brian Mann | Dialogue Editor |
| Derek V. Browne | Camera Operator |
| Harry Lange | Production Design |
| Malcolm Stone | Art Direction |
| Brian Froud | Costume Design |
| Dina Eaton | Music Editor |
| John Marshall | Art Direction |
| Betty Adamson | Wardrobe Supervisor |
| Michael Clifford | Music Editor |
| Jean-Pierre Amiel | Choreographer |
| Jim Henson | Story |
| Charles Bishop | Supervising Art Director |
| Richard Holland | Set Designer |
| Dusty Symonds | First Assistant Director |
| Bi Benton | Production Coordinator |
| Terry Ackland-Snow | Art Direction |
| Peter Young | Set Decoration |
| Reg Bream | Draughtsman |
| Katharina Kubrick | Assistant Art Director |
