Renny Harlin was 21 in The Breakthrough when he played the character 'Police officer (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 65, and has starred in 13 movies in total, 12 of those since The Breakthrough was released.
In The Breakthrough, I think Renny Harlin looks: