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