Ronny Cox was 31 in The Chicago Conspiracy Trial when he played an uncredited character.
That was over 54 years ago in 1970.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 85, and has starred in 84 movies in total, 82 of those since The Chicago Conspiracy Trial was released.
In The Chicago Conspiracy Trial, I think Ronny Cox looks: