 | Jack Black als Dethklok's Original Manager / Fat Fan (voice) |
 | Mark Hamill als Mr. Salacia / Senator Stampingston (voice) |
 | Mike Keneally als Toki Wartooth (voice) |
 | Malcolm McDowell als Vater Orlagg (voice) |
 | Brendon Small als 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 als General Crozier (voice) |
 | Raya Yarbrough als Abigail Remeltindrinc / Old Groupie (voice) |
| Ulrich Wild als Bald Fan (voice) (uncredited) |
 | George Fisher als Metal Masked Assassin (voice) |
| Mark Brooks | Writer |
| Mark Brooks | Director |
| Janine Ditullio | Writer |
| Brendon Small | Writer |
| Brendon Small | Creator |
| Tommy Blacha | Creator |
| Brendon Small | Executive Producer |
| Shannon Prynoski | Producer |
