Cloris Leachman was 28 in Kiss Me Deadly when she played the character 'Christina Bailey'.
That was over 69 years ago in 1955.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 2021 she died aged 94, starring in 141 films in her career, 140 of those after Kiss Me Deadly was first released. If she were alive today she would be 98.
In Kiss Me Deadly, I think Cloris Leachman looks: