Les aventures extraordinaires de Capitaine Superslip

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)

Erica Luttrell

Erica (voice)

Laraine Newman

Ms. Ribble (voice)

David Koechner

Mr. Meaner (voice)

Patty Mattson

Miss Anthrope (voice)

Clancy Brown

Mr. Ree (voice)

Eric Bauza

Rap Talkwell (voice)

Kevin Michael Richardson

George's Dad / Dune Buggy (voice)

Mindy Sterling

Melvin's Mom (voice)

Nolan North

Nanozero / Flash Flood (voice)

Tress MacNeille

Ms. Hurd / DJ Drowsy Drawers (voice)

Maggie Wheeler

Lunch Lady (voice)

Trevor Devall

Smartsy Fartsy (voice)

Fred Tatasciore

Keithicus / Rippedicus / Guardicus (voice)

Max Koch

Hank (voice)

Steve-O

Lane Junkston (voice)

Maurice LaMarche

Tubbadump (voice)