On screen
Cast
28 credited performers
Mark Hamill
Senator Stampingston / Mr. Selatcia (voice)
Victor Brandt
General Crozier / Cardinal Ravenwood (voice)
Brendon Small
Skwisgaar Skwigelf / Pickles the Drummer / Nathan Explosion
Tommy Blacha
Toki Wartooth / William Murderface (voice)
Malcolm McDowell
Vater Orlaag (voice)
Laraine Newman
Liz Bane (voice)
George Fisher
Hippie (voice)
James Hetfield
Fan #1 (voice)
King Diamond
Ronald von Moldenberg (voice)
Kirk Hammett
Smoked Fingers fan (voice)
Jon Schnepp
Additional Voices (voice)
Silenoz
Yaneemango Indian (voice)
Angela Gossow
Lavona Sucubboso (voice)
Mike Patton
Character not listed
Laura Silverman
Rebecca Nightrod (voice)
Devin Townsend
Teenage Fan at Juice Joint (voice)
ICS Vortex
Mitch (voice)
Werner Herzog
Character not listed
Brian Posehn
Character not listed
Gene Hoglan
Character not listed
Jeff Loomis
Mr. Murderface (voice)
Warrel Dane
Sammy Twinskins (voice)
Artwork unavailable
Steve Smyth
Snizzy Bullets (voice)
Andy Richter
J.F. Amarth (voice)
Artwork unavailable
Mike Keneally
Doctor (voice)
Frankie Ingrassia
Rachel / Sucubboso Explosionite (voice)
Slash
Character not listed
Dave Grohl
Character not listed