Maureen O'Hara was 16 in Kicking the Moon Around when she played the character 'Secretary'.
That was over 86 years ago in 1938.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 2015 she died aged 95, starring in 69 films in her career, 68 of those after Kicking the Moon Around was first released. If she were alive today she would be 103.
In Kicking the Moon Around, I think Maureen O'Hara looks: