Knoxville was born Philip John Clapp in Knoxville, Tennessee. His father, Philip, was a tire/car salesman, and his mother, Lemoyne Clapp (née Houck), taught Sunday school.\n', '

Knoxville credits a copy of Jack Kerouac\'s On the Road, given to him by his cousin, singer-songwriter Roger Alan Wade, with giving him the acting bug.\n', '

After graduating from South Young High School in 1989 in Knoxville, he moved to California to become an actor. In the beginning, Knoxville appeared mostly in commercials and made several minor appearances as an extra. \n', '

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