Cast and Crew of The Spooky Tale of Captain Underpants Hack-a-ween

The Spooky Tale of Captain Underpants Hack-a-ween

When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success!

Full Cast of The Spooky Tale of Captain Underpants Hack-a-ween

Kevin Michael Richardson as Diddlysaurus / George's Dad (voice)

Kevin Michael Richardson

Diddlysaurus / George's Dad (voice)
 Kari Wahlgren as Mayor Hoppy McChapper (voice)

Kari Wahlgren

Mayor Hoppy McChapper (voice)
 Nat Faxon as Captain Underpants / Mr. Krupp (voice)

Nat Faxon

Captain Underpants / Mr. Krupp (voice)
 Erica Luttrell as Erica / George's Mom (voice)

Erica Luttrell

Erica / George's Mom (voice)
 David Koechner as Mr. Meaner (voice)

David Koechner

Mr. Meaner (voice)
 Clancy Brown as Mr. Ree (voice)

Clancy Brown

Mr. Ree (voice)
 Sean Astin as Narrator / Mr Gigglenose (voice)

Sean Astin

Narrator / Mr Gigglenose (voice)
 Evan Kishiyama as Steve "Gooch" Yamaguchi (voice)

Evan Kishiyama

Steve "Gooch" Yamaguchi (voice)
 Mindy Sterling as Melvin's Mom (voice)

Mindy Sterling

Melvin's Mom (voice)