Joanna Moore was 21 in Appointment with a Shadow when she played the character 'Penny Spencer'.
That was over 67 years ago in 1957.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 1997 she died aged 63, starring in 16 films in her career, 15 of those after Appointment with a Shadow was first released. If she were alive today she would be 89.
In Appointment with a Shadow, I think Joanna Moore looks: