Caroline Munro was 16 in Smoke Over London when she played the character 'Beautiful Brunette'.
That was over 58 years ago in 1966.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 75, and has starred in 64 movies in total, 63 of those since Smoke Over London was released.
In Smoke Over London, I think Caroline Munro looks: