Riven

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)

Dav Pilkey

Novel

Mark Banker

Writer

Seung Woo Cha

Director

Kevin Peaty

Director

Matt Smith

Writer

Peter Hastings

Executive Producer

Peter McCown

Line Producer

Ashley Laidlaw

Line Producer

Todd Grimes

Supervising Producer

Jared Faber

Music

Fred Kron

Music

David Wiebe

Executive In Charge Of Production

Andrew Bendik

Storyboard Artist

Derek Moore

Storyboard Artist

Ryan Hansen

Storyboard Artist

Ian Young

Storyboard Artist