Knoxville Talks Wedgies at 'Bad Grandpa' Premiere

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Jackass star Johnny Knoxville is back up to his hilarious pranks on unsuspecting folks, this time in a feature-length film starring his outrageous "Irving Zisman" character on a road trip with his Fun Size co-star, Jackson Nicoll. Watch the red-carpet highlights from Wednesday's Hollywood premiere of Bad Grandpa!

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"Oh, we had a ball making this movie," says Knoxville. "We shot 60 days over 10 months, so it was like a big family and it was really sad when we stopped filming, but we were really happy with what we got."

In theaters Friday, Jackass Presents: Bad Grandpa is a cross-country tale captured on hidden cameras that pairs Knoxville with Jackson as his grandson and unlikely companion, 8-year-old Grandson Billy. As Irving introduces the young and impressionable Billy to people, places and wild situations -- male strippers, a child beauty pageant, a funeral home service and a biker bar to name a few -- cameras capture the reactions of real people who just can't believe what they've just seen.

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Johnny shares that there were wedgies aplenty on the Bad Grandpa set because, "That was the only way I could get him back because I can't hit him in the nuts because they haven't dropped yet. ... He hit me 273 times, so he got about half that in wedgies."