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Nat Faxon - Captain Underpants / Mr. Krupp / Buffalobe (voice)Jay Gragnani - Harold Hutchins (voice)Ramone Hamilton - George Beard / Young Mr. Cleveland (voice)Sean Astin - Narrator / Putter Mulligan (voice)Dayci Brookshire - Jessica / Dressy / Smartaconda (voice)Jorge Diaz - Melvin / Stanley Peet (voice)Todd Grimes - Benjamin Franklin (voice)Peter Hastings - Comic Narrator / Marlin (voice)Evan Kishiyama - Steve 'Gooch' Yamaguchi (voice)David Koechner - Mr. Meaner (voice)Phil LaMarr - Mr. Cleveland / Viper Chai (voice)Erica Luttrell - Erica (voice)Patty Mattson - Miss Anthrope (voice)Brennan Murray - Bo Hweemuth (voice)Nolan North - Lee Dingman / Hugo Mouthingwad (voice)
Ratings
from TMDB8.0/ 108 votes