Cast
Nat Faxon
Captain Underpants / Mr. Krupp (voice)
Jay Gragnani
Harold (voice)
Ramone Hamilton
George (voice)
Sean Astin
Narrator / Mr Gigglenose (voice)
Dayci Brookshire
Jessica / Dressy (voice)
Clancy Brown
Mr. Ree (voice)
Jorge Diaz
Melvin / Stanley Peet / Melvin's Dad (voice)
Peter Hastings
Comic Narrator (voice)
Evan Kishiyama
Steve 'Gooch' Yamaguchi (voice)
David Koechner
Mr. Meaner (voice)
Crew
Dav Pilkey
Novel
Mark Banker
Writer
Matt Smith
Writer
Seung Woo Cha
Director
Kevin Peaty
Director
Peter Hastings
Executive Producer
Peter McCown
Line Producer
Ashley Laidlaw
Line Producer
Todd Grimes
Supervising Producer
Jared Faber
Music
Recommended
Info provided by The Movie Database. Watch sources provided by JustWatch.