Rob Corddry was 31 in Old School when he played the character 'Warren'.
That was over 21 years ago in 2003.
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 46 movies in total, 45 of those since Old School was released.
In Old School, I think Rob Corddry looks: