Honor Blackman was 21 in Fame Is the Spur when she played the character 'Emma (uncredited)'.
That was over 77 years ago in 1947.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 2020 she died aged 94, starring in 63 films in her career, 62 of those after Fame Is the Spur was first released. If she were alive today she would be 98.
In Fame Is the Spur, I think Honor Blackman looks: