Brian De Palma was 27 in Greetings when he played the character 'Man smoking in front of draft office'.
That was over 54 years ago in 1968.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 82, and has starred in 27 movies in total, 26 of those since Greetings was released.
In Greetings, I think Brian De Palma looks: