Sean Penn was 19 in Hellinger's Law when he played the character 'Bit Part (uncredited)'.
That was over 43 years ago in 1981.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 63, and has starred in 90 movies in total, 87 of those since Hellinger's Law was released.
In Hellinger's Law, I think Sean Penn looks: