Clark Duke was 20 in Superbad when he played the character 'Party Teenager #1'.
That was over 17 years ago in 2007.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 39, and has starred in 18 movies in total, 17 of those since Superbad was released.
In Superbad, I think Clark Duke looks: