Mike Judge as Beavis / Butt-Head (voice)

James Hetfield as James Hetfield (voice)

Lars Ulrich as Lars Ulrich (voice)

Kirk Hammett as Kirk Hammett (voice)

Robert Trujillo as Robert Trujillo (voice)

Bootsy Collins as Bootsy Collins (voice)

Matt Stone as Kyle Broflovski / Kenny McCormick (voice)

Brendon Small as Nathan Explosion (voice)

Benji Webbe as (voice)

Trey Parker as Eric Cartman / Stan Marsh (voice)

Lemmy Kilmister as Lemmy (voice)