Nastassja Kinski was 13 in Wrong Move when she played the character 'Mignon (as Nastassja Nakszynski)'.
That was over 49 years ago in 1975.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 63, and has starred in 76 movies in total, 74 of those since Wrong Move was released.
In Wrong Move, I think Nastassja Kinski looks: