Johnny Knoxville poses in front of a questionable inflatable 'dinosaur' for Jackass Forever

Johnny Knoxville Poses with Co-Star Chris Pontius' 'Pontiusaurus' to Promote 'Jackass Forever'

Johnny Knoxville & Machine Gun Kelly Suit Up for the 'Jackass Forever' Premiere

Johnny Knoxville and Machine Gun Kelly lead the stars at Jackass Forever premiere