Jack Black - Dethklok's Original Manager / Fat Fan (voice)
Mark Hamill - Mr. Salacia / Senator Stampingston (voice)
Mike Keneally - Toki Wartooth (voice)
Malcolm McDowell - Vater Orlagg (voice)
Brendon Small - Nathan Explosion / Skwisgaar Skwigelf / Pickles / William Murderface / Young Toki Wartooth / Charles Offdensen / Ishnifus Meaddle / Edgar Jomfru / Eric Jomfru / Magnus Hammersmith / Dr. Rockzo (voice)
Victor Brandt - General Crozier (voice)
Raya Yarbrough - Abigail Remeltindrinc / Old Groupie (voice)