Heather Locklear was 19 in The Return of the Beverly Hillbillies when she played the character 'Heather'.
That was over 43 years ago in 1981.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 62, and has starred in 29 movies in total, 30 of those since The Return of the Beverly Hillbillies was released.
In The Return of the Beverly Hillbillies, I think Heather Locklear looks: