Casting | Rôle |
|---|
| 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) |
| Ulrich Wild | Bald Fan (voice) (uncredited) |
| George Fisher | Metal Masked Assassin (voice) |
