Gene Hackman was 30 in Mad Dog Coll when he played the character 'Cop (uncredited)'.
That was over 63 years ago in 1961.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 94, and has starred in 113 movies in total, 112 of those since Mad Dog Coll was released.
In Mad Dog Coll, I think Gene Hackman looks: