Cast 17

1. 

   Nat Faxon

   Captain Underpants / Mr. Krupp (voice)

2. Jay Gragnani

   Harold (voice)

3. 

   Ramone Hamilton

   George (voice)

4. 

   Sean Astin

   Narrator / Mr Gigglenose (voice)

5. 

   Dayci Brookshire

   Jessica / Dressy (voice)

6. 

   Clancy Brown

   Mr. Ree (voice)

7. 

   Jorge Diaz

   Melvin / Stanley Peet / Melvin's Dad (voice)

8. Peter Hastings

   Comic Narrator (voice)

9. 

   Evan Kishiyama

   Steve "Gooch" Yamaguchi (voice)

10. 

    David Koechner

    Mr. Meaner (voice)

11. 

    Erica Luttrell

    Erica / George's Mom (voice)

12. 

    Patty Mattson

    Miss Anthrope / Harold's Mom (voice)

13. 

    Brennan Murray

    Bo Hweemuth (voice)

14. 

    Kevin Michael Richardson

    Diddlysaurus / George's Dad (voice)

15. 

    Mindy Sterling

    Melvin's Mom (voice)

16. 

    Stephen Tobolowsky

    Creepy Rattlechains (voice)

17. 

    Kari Wahlgren

    Mayor Hoppy McChapper (voice)

Crew 5