Treat Williams was 23 in Deadly Hero when he played the character 'Billings'.
That was over 48 years ago in 1975.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 72, and has starred in 98 movies in total, 97 of those since Deadly Hero was released.
In Deadly Hero, I think Treat Williams looks: