Timothy Hutton was 17 in Zuma Beach when he played the character 'Art'.
That was over 46 years ago in 1978.
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 73 movies in total, 71 of those since Zuma Beach was released.
In Zuma Beach, I think Timothy Hutton looks: