Character Name : JB

Original Name : Jack Black

Gender : Male

Character Name : KG

Original Name : Kyle Gass

Gender : Male

Character Name : Lee

Original Name : JR Reed

Gender : Male

Character Name : Dio

Original Name : Ronnie James Dio

Gender : Male

Character Name : Open Mic Host

Original Name : Paul F. Tompkins

Gender : Male

Character Name : Lil' JB

Original Name : Troy Gentile

Gender : Male

Character Name : Security Guard

Original Name : Ned Bellamy

Gender : Male

Character Name : Security Guard

Original Name : Fred Armisen

Gender : Male

Character Name : Car Chase Cop / Gang Leader

Original Name : Kirk Ward

Gender : Male

Character Name : Truck Stop Waitress

Original Name : Amy Poehler

Gender : Female

Character Name : The Stranger

Original Name : Tim Robbins

Gender : Male

Character Name : Satan

Original Name : Dave Grohl

Gender : Male

Character Name : Guitar Center Guy

Original Name : Ben Stiller

Gender : Male

Character Name : Girl

Original Name : Lara Everly

Gender : Female

Character Name : Girl

Original Name : Brittany Eldridge

Gender : Male

Character Name : Girl

Original Name : Melissa-Anne Davenport

Gender : Female

Character Name : Gang Member

Original Name : John Ennis

Gender : Male

Character Name : Gang Member

Original Name : Vincent Foster

Gender : Male

Character Name : Gang Member

Original Name : Jay Johnston

Gender : Male

Character Name : Drunk Frat Dude

Original Name : Colin Hanks

Gender : Male

Character Name : Al's Bar Waitress

Original Name : Stephanie Erb

Gender : Female

Character Name : Gorgeous Woman

Original Name : Amy Adams

Gender : Female

Character Name : Tattooed Biker

Original Name : Milos Milicevic

Gender : Male

Character Name : Ecstatic Woman

Original Name : Molly Bryant

Gender : Female

Character Name : Poopy Guy

Original Name : Michael Rivkin

Gender : Male

Character Name : Stand Up Comic

Original Name : Gregg Turkington

Gender : Male

Character Name : Exploding Head Guy

Original Name : Patrick M. Walsh

Gender : Male

Character Name : Fainting Woman

Original Name : Bevin Kaye

Gender : Female

Character Name : KG's Mother

Original Name : Evie Peck

Gender : Male

Character Name : Young KG

Original Name : Mason Knight

Gender : Male

Character Name : Bully

Original Name : Erik Walker

Gender : Male

Character Name : Betty Black

Original Name : Cynthia Ettinger

Gender : Female

Character Name : Billy Black

Original Name : Andrew Lewis Caldwell

Gender : Male

Character Name : Tarot Card Reader

Original Name : Laura Milligan

Gender : Male

Character Name : Frat Boy #1 (uncredited)

Original Name : Jason Segel

Gender : Male

Character Name : Bud Black (uncredited)

Original Name : Meat Loaf

Gender : Male

Character Name : Sasquatch (uncredited)

Original Name : John C. Reilly

Gender : Male