Jack Black
JB
Acting
Kyle Gass
KG
Acting
JR Reed
Lee
Acting
Ronnie James Dio
Dio
Acting
Paul F. Tompkins
Open Mic Host
Acting
Troy Gentile
Lil' JB
Acting
Ned Bellamy
Security Guard
Acting
Fred Armisen
Security Guard
Acting
Kirk Ward
Car Chase Cop / Gang Leader
Acting
Amy Poehler
Truck Stop Waitress
Acting
Tim Robbins
The Stranger
Acting
Dave Grohl
Satan
Acting
Ben Stiller
Guitar Center Guy
Acting
Lara Everly
Girl
Acting
Brittany Eldridge
Girl
Acting
Melissa-Anne Davenport
Girl
Acting
John Ennis
Gang Member
Acting
Vincent Foster
Gang Member
Acting
Jay Johnston
Gang Member
Acting
Colin Hanks
Drunk Frat Dude
Acting
Stephanie Erb
Al's Bar Waitress
Acting
Amy Adams
Gorgeous Woman
Acting
Milos Milicevic
Tattooed Biker
Acting
Molly Bryant
Ecstatic Woman
Acting
Michael Rivkin
Poopy Guy
Acting
Gregg Turkington
Stand Up Comic
Acting
Patrick M. Walsh
Exploding Head Guy
Acting
Bevin Kaye
Fainting Woman
Crew
Evie Peck
KG's Mother
Acting
Mason Knight
Young KG
Acting
Erik Walker
Bully
Acting
Cynthia Ettinger
Betty Black
Acting
Andrew Lewis Caldwell
Billy Black
Acting
Laura Milligan
Tarot Card Reader
Acting
Jason Segel
Frat Boy #1 (uncredited)
Acting
Meat Loaf
Bud Black (uncredited)
Acting
John C. Reilly
Sasquatch (uncredited)
Acting