Julie Adams was 22 in The Dalton Gang when she played the character 'Polly Medford'.
That was over 75 years ago in 1949.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 2019 she died aged 92, starring in 53 films in her career, 52 of those after The Dalton Gang was first released. If she were alive today she would be 97.
In The Dalton Gang, I think Julie Adams looks: