Johnny Knoxville was 22 in Desert Blues when he played the character 'Bob (as Phillip John)'.
That was over 29 years ago in 1995.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 53, and has starred in 91 movies in total, 86 of those since Desert Blues was released.
In Desert Blues, I think Johnny Knoxville looks: