Skylar Astin was 17 in Stagedoor when he played the character 'Himself'.
That was over 18 years ago in 2006.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 36, and has starred in 20 movies in total, 19 of those since Stagedoor was released.
In Stagedoor, I think Skylar Astin looks: