Lindsay Duncan was 23 in Further Up Pompeii when she played the character 'Scrubba'.
That was over 49 years ago in 1975.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 73, and has starred in 55 movies in total, 54 of those since Further Up Pompeii was released.
In Further Up Pompeii, I think Lindsay Duncan looks: