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)

Steve-O

Lane Junkston (voice)

Tress MacNeille

Ms. Hurd / DJ Drowsy Drawers (voice)

Erica Luttrell

Erica (voice)

David Koechner

Mr. Meaner (voice)

Laraine Newman

Ms. Ribble (voice)

Clancy Brown

Mr. Ree (voice)

Patty Mattson

Miss Anthrope (voice)

Maggie Wheeler

Lunch Lady (voice)

Maurice LaMarche

Tubbadump (voice)

Kari Wahlgren

Mayor Hoppy McChapper (voice)