Tatiana Maslany was 16 in The Recital when she played the character 'Diana Mills'.
That was over 21 years ago in 2003.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 38, and has starred in 40 movies in total, 40 of those since The Recital was released.
In The Recital, I think Tatiana Maslany looks: