Alison Pill was 11 in Degas and the Dancer when she played the character 'Marie von Goetham'.
That was over 25 years ago in 1998.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 37, and has starred in 55 movies in total, 53 of those since Degas and the Dancer was released.
In Degas and the Dancer, I think Alison Pill looks: