Steve Guttenberg was 17 in Something for Joey when he played the character 'Mike Cappelletti'.
That was over 47 years ago in 1977.
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 80 movies in total, 79 of those since Something for Joey was released.
In Something for Joey, I think Steve Guttenberg looks: