Bradley Cooper was 25 in Wet Hot American Summer when he played the character 'Ben'.
That was over 23 years ago in 2001.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 49, and has starred in 67 movies in total, 63 of those since Wet Hot American Summer was released.
In Wet Hot American Summer, I think Bradley Cooper looks: