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Nat Faxon - Captain Underpants / Mr. Krupp (voice)Jay Gragnani - Harold (voice)Ramone Hamilton - George (voice)Sean Astin - Narrator (voice)Dayci Brookshire - Jessica / Dressy (voice)Jim Cummings - Santa (voice)Jorge Diaz - Melvin / Stanley Peet (voice)Peter Hastings - Comic Narrator (voice)Evan Kishiyama - Steve 'Gooch' Yamaguchi (voice)David Koechner - Mr. Meaner (voice)Erica Luttrell - Erica / George's Mom (voice)Patty Mattson - Miss Anthrope / Harold's Mom (voice)Brennan Murray - Bo Hweemuth (voice)Nolan North - Yule Tide / Lee Dingman / Movie Harold / Movie Santa (voice)Kevin Michael Richardson - George's Dad / Movie George (voice)
Ratings
from TMDB6.4/ 1027 votes