Marg Helgenberger was 29 in After Midnight when she played the character 'Alex (segment "All Night Operator")'.
That was over 35 years ago in 1989.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 65, and has starred in 38 movies in total, 37 of those since After Midnight was released.
In After Midnight, I think Marg Helgenberger looks: