Peter Gallagher was 23 in Skag when he played the character 'John Skagska'.
That was over 44 years ago in 1980.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 68, and has starred in 85 movies in total, 83 of those since Skag was released.
In Skag, I think Peter Gallagher looks: