| Cast list | | Jack Black | as | JB | | Kyle Gass | as | KG | | Jason Reed | as | Lee (as JR Reed) | | Ronnie James Dio | as | Dio | | Paul F. Tompkins | as | Open Mic Host | | Troy Gentile | as | Lil' JB | | Ned Bellamy | as | Security Guard #1 | | Fred Armisen | as | Security Guard #2 | | Kirk Ward | as | Car Chase Cop/Gang Leader | | Amy Poehler | as | Truck Stop Waitress | | Tim Robbins | as | The Stranger | | David Grohl | as | Satan (as Dave Grohl) | | Ben Stiller | as | Guitar Center Guy | | Lara Everly | as | Girl #1 | | Brittany Eldridge | as | Girl #2 |
| | Crew list: | | Liam Lynch (Director) | | Jack Black (Writer) | | Kyle Gass (Writer) |
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