Philip John Clapp, known professionally by his stage name Johnny Knoxville, is an American actor, film producer, screenwriter, comedian and stunt performer. He is best known as a co-creator and star of the MTV reality stunt show Jackass, which aired for three seasons from 2000–2002. A year later, Knoxville and his co-stars returned for the first installment in the Jackass film series, with a second and third installment being released in 2006 and 2010, respectively. Jackass Presents: Bad Grandpa, the first film in the series with a storyline, saw him star as his Jackass character Irving Zisman.