Isabelle Huppert was 17 in Le Prussien when she played the character 'Elisabeth'.
That was over 52 years ago in 1971.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 71, and has starred in 169 movies in total, 163 of those since Le Prussien was released.
In Le Prussien, I think Isabelle Huppert looks: