Nat Faxon
Captain Underpants / Mr. Krupp (voice)
Jay Gragnani
Harold (voice)
Ramone Hamilton
George (voice)
Sean Astin
Narrator (voice)
Peter Hastings
Comic Narrator (voice)
Jorge Diaz
Melvin (voice)
Dayci Brookshire
Jessica / Dressy (voice)
Evan Kishiyama
Steve 'Gooch' Yamaguchi (voice)
