Marion Cotillard was 17 in The Story of a Boy Who Wanted to Be Kissed when she played the character 'Mathilde'.
That was over 30 years ago in 1994.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 48, and has starred in 84 movies in total, 82 of those since The Story of a Boy Who Wanted to Be Kissed was released.
In The Story of a Boy Who Wanted to Be Kissed, I think Marion Cotillard looks: