Greg Kinnear was 23 in What Price Victory when he played the character 'Teacher's Assistant'.
That was over 36 years ago in 1988.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 60, and has starred in 60 movies in total, 58 of those since What Price Victory was released.
In What Price Victory, I think Greg Kinnear looks: