https://www.youtube.com/watch?v=czXHLSjC81M
Before Maura Tierny was a doctor on ER, she was attending high school in Student Exchange. She looks the same now as she did when she was 21 making her acting debut in that 1987 movie.
BTW if you have never seen that movie, I highly recommend viewing it. It is an enjoyable feature that you can watch whenever you want a film to make you smile.