John Lithgow was 25 in Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues when he played the character 'John'.
That was over 52 years ago in 1972.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 78, and has starred in 126 movies in total, 119 of those since Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues was released.
In Dealing: Or the Berkeley-to-Boston Forty-Brick Lost-Bag Blues, I think John Lithgow looks: