Known for his outrageous stunt series Jackass, he just debuted his latest comedy starring one of that franchise's most popular characters -- 86-year-old naughty grandpa Irving Zisman. Here are five things you probably don't know about Johnny Knoxville.
1. Born Philip John Clapp on March 11, 1971 in Knoxville, TN -- his mother was a Sunday School teacher and his father worked as a car and tire salesman.
4. Was knocked unconscious three times during making of2002's Jackass: The Movie.
5. Was detained at LAX airport in January 2009 after security screeners spotted a suspicious looking, grenade-shaped device in one of his bags. Airport authorities later learned that the item was a prop from a commercial photo shoot.