Jonathan Frakes was 25 in Beach Patrol when he played the character 'Marty Green'.
That was over 45 years ago in 1979.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 71, and has starred in 43 movies in total, 39 of those since Beach Patrol was released.
In Beach Patrol, I think Jonathan Frakes looks: