The Spooky Tale of Captain Underpants: Hack-a-ween

Nat Faxon

as Captain Underpants / Mr. Krupp (voice)

Jay Gragnani

as Harold (voice)

Ramone Hamilton

as George (voice)

Sean Astin

as Narrator / Mr Gigglenose (voice)

Dayci Brookshire

as Jessica / Dressy (voice)

Clancy Brown

as Mr. Ree (voice)

Jorge Diaz

as Melvin / Stanley Peet / Melvin's Dad (voice)

Peter Hastings

as Comic Narrator (voice)

Evan Kishiyama

as Steve "Gooch" Yamaguchi (voice)

David Koechner

as Mr. Meaner (voice)

Erica Luttrell

as Erica / George's Mom (voice)

Patty Mattson

as Miss Anthrope / Harold's Mom (voice)

Brennan Murray

as Bo Hweemuth (voice)

Kevin Michael Richardson

as Diddlysaurus / George's Dad (voice)

Mindy Sterling

as Melvin's Mom (voice)

Stephen Tobolowsky

as Creepy Rattlechains (voice)

Kari Wahlgren

as Mayor Hoppy McChapper (voice)