Audrey Hepburn was 23 in Roman Holiday when she played the character 'Princess Ann'.
That was over 71 years ago in 1953.
In 1993 she died aged 63, starring in 58 films in her career, 50 of those after Roman Holiday was first released. If she were alive today she would be 95.
In Roman Holiday, I think Audrey Hepburn looks: