Jack Black

as Bethany

as Zeke (voice)

as Po (voice)

as Lithdor (voice)

as Captain Bombardier

as Bowser (voice)

as Milo (voice)

as Professor Sheldon 'Shelly' Oberon

as Carl Denham

as Po (voice)

as Jeff Portnoy

as Lenny (voice)

as Po (voice)

as Dewey Finn

as Billy Glenn Norris

as Miles

as Sam

as Motorcyclist

as Fiedler

as Wasteland Scrap

as YouPorn Owner (uncredited)

as Pilot

Role: Songs

as Stine / Slappy / Invisible Boy (voice)

as Bowser (voice)

as Bart 'Zero' Liquori

as Po (voice)

as Steve

as Hal Larson

as Rick

as Lemuel Gulliver

as Jonathan Barnavelt

as Barry

as Ian Lamont

as Buddy

as Zed

as Ignacio / Nacho

as JB

as Titus Telesco (uncredited)

as Jack Black (uncredited)

as R.L. Stine (uncredited)

as Claptrap (voice)

as Aspartamay

as Craig Poncelet

as Jerry

as Doug McCallister

as Bernie Tiede

as Brad Harris

as Broadcast Technician

as Paul McCartney (uncredited)

as Dexter

as Wolfman Jack

as Self

as J.D. McNugent

as Dr. Isaac Hershberg

as Nick Vanderpark

as Satan

as Self - Host

as Lance Brumder

as Po (voice)

as Slip

as Tenacious D

as Self

as Po (voice)

as Self - Guest

as Grown Up Stan (voice)

as Jan Lewan

as Malcolm

as Pritchard

as Self

as Po (voice)

as Dan Landsman

as Self

as Po (voice)

as Po (voice)

as Self

as Kevin Wilkins

as Monte

as Self

as Chuck

as Self

as Roger Davis

as Alex Talbot

as Self

as Self - Guest

Role: Producer

as Self - Guest

as Self

as Self

as Self - Guest

Role: Characters

as William Mulholland

as Po (voice)

as Sid

as Pusher / Larry Hardcore (voice)

as Self - Guest

as Farmer / Satan / God

as Joseph Stalin

as MCA (B-Boys 2)

as Self

as Self

as Augie

as Self

as Self

as Lead Chimney Sweep

as Self

as DJ at Party

as Jamison Friend

as Georgie

as Self

as Self

as Fisherman

as Dan Ringley

as Self - Guest

as Self

as Jeff Portnoy

as Dethklok's Original Manager / Fat Fan (voice)

as Steve

as Curtis Williams

as Devlin

as Self

as Self

as Self

as Self - Special Guest

as Self

as Jack 'JB' Black

as Tenacious O (voice)

as Self

as Self - Actor

as Trapper JB (voice)

as Mental Patient (uncredited)

as Self

as Jack Austin

as Self (archive footage) (uncredited)

as Private

as Self

as Cab Driver

as Skinhead

as Self

as Self

as Self

as Self

as Jesus Christ

as Self - Host

as Self

as Self

as Jerry

as Lenny (voice)

as Self

as Westley

as Self

as Host

as Self

as Self

as Self

as Self - Reader: Declaration of Independence

as Self - Game Master

as Self

as Brad Gunter (voice)

as George Washington

as Self

as Self

as Self

as Self

as Self - Contestant

as Self

as Self

as Self

as Self - Judge

as Ludwig van Beethoven

as Self

as Self

as Self - Presenter

as Self - Actor

as Self

as Nick

as Self - Presenter

as Self (archive footage)

as Self

as Self - Interviewee

as Self

as Self - Presenter

as Self

as Self

as Self

as Self

as Computerman

as J.D

as Randy

as Self

as Marty Prago

as Self

as Self

as Self

as Po (voice)

as Self

as Po (voice)

as Self

as Tommy

as Self

as Self

as Self

as Car Thief

as Self

as JB

as Jack Austin

as Self

as Self

as Self

as JB

as Big Tommy

as Self

as Self

as JB

as Po (Voice)

as Aspartamay

as Ray

as Doug

as Self

as Bruce Philapousis

as JB

as Self - Guest

as (Special Appearance)

as Self - Presenter

as JB

as Sheriff

as Self

as JB

as JB

as Self

as Self

as The Mayor

as The Elegant Hunter

Role: Executive Producer

Role: Executive Producer

as Lewis (voice)

as JB

as Self

as Self

as Self

as Self

as Self

as Self

as Rick

as Self

as Self

as Self

as Self

as Professor Sheldon 'Shelly' Oberon

as Multiple Roles/Jerry

as Self

as Steve

as self

as Himself

as Self

as Self

as Steve

as Self - Host

as Computerman

as self

as The Wizard of Hollywood

Role: Associate Producer

Role: Executive Producer

Role: Executive Producer

Role: Executive Producer