<Li> Ed Helms as Mr. Benjamin `` Benny '' Krupp / Captain Underpants , the mean - spirited principal of Jerome Horwitz Elementary School , who is hypnotized into becoming the superhero created by George and Harold . </Li>
<Li> Ed Helms as Mr. Benjamin `` Benny '' Krupp / Captain Underpants , the mean - spirited principal of Jerome Horwitz Elementary School , who is hypnotized into becoming the superhero created by George and Harold . </Li>
actor who voices captain underpants in 2017 film
actor who voices captain underpants in 2017 film
Ed Helms
Ed Helms