Guillaume Canet was 20 in Jeanne when he played an uncredited character.
That was over 29 years ago in 1994.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 51, and has starred in 69 movies in total, 66 of those since Jeanne was released.
In Jeanne, I think Guillaume Canet looks: