Capitaine Superslip et l'assaut ahurissant de l'armada alien

Nat Faxon

Captain Underpants / Mr. Krupp (voice)

Jay Gragnani

Harold (voice)

Ramone Hamilton

George (voice)

Sean Astin

Narrator (voice)

Peter Hastings

Comic Narrator (voice)

Gary Anthony Williams

Dupe Licitous (voice)

Secunda Wood

Moxie Swaggerman / Hailey Comett (voice)

Peter Hastings

Garg (voice)

David Koechner

Sqworg (voice)

Nolan North

Dr. Shifty Fitzgibbons / Jett Wingman / Itsius (voice)