Jon Hamm was 28 in Space Cowboys when he played the character 'Young Pilot #2'.
That was over 24 years ago in 2000.
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 60 movies in total, 56 of those since Space Cowboys was released.
In Space Cowboys, I think Jon Hamm looks: