Phoebe Cates was 17 in Paradise when she played the character 'Sarah'.
That was over 42 years ago in 1982.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 60, and has starred in 23 movies in total, 23 of those since Paradise was released.
In Paradise, I think Phoebe Cates looks: