Audrey Hepburn was 18 in Dutch in Seven Lessons when she played the character 'Stewardess / Girl with lute'.
That was over 75 years ago in 1948.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 1993 she died aged 63, starring in 58 films in her career, 58 of those after Dutch in Seven Lessons was first released.
In Dutch in Seven Lessons, I think Audrey Hepburn looks: