Patrick Warburton

as Rock Slyde

Andy Dick

as Bart

Rena Sofer

as Sara

Elaine Hendrix

as Judy Bee

Jason Alexander

as Mailman Stan

Eric Roberts

as Jake the Deliveryman

Lea Thompson

as Master Bartologist

Terry Chen

as David

Jerry Cantrell

as Jerry

Brian Bosworth

as The Friendly Pirate

Guillermo Rodriguez

as Gary

Zac Kintner

as Freak out Bartologist

William Brent

as Young Rock (as Billy Unger)

Kristin Adams

as Bartender