Marilyn Monroe was 26 in How to Marry a Millionaire when she played the character 'Pola Debevoise'.
That was over 71 years ago in 1953.
In 1962 she died aged just 36, starring in 94 films in her career, 72 of those after How to Marry a Millionaire was first released. If she were alive today she would be 98.
In How to Marry a Millionaire, I think Marilyn Monroe looks: