Emily Blunt was 19 in Boudica when she played the character 'Isolda'.
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 41, and has starred in 53 movies in total, 45 of those since Boudica was released.
In Boudica, I think Emily Blunt looks: