Katherine Parkinson was 26 in Ahead of the Class when she played the character 'Vicky Foley'.
That was over 19 years ago in 2005.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 46, and has starred in 18 movies in total, 17 of those since Ahead of the Class was released.
In Ahead of the Class, I think Katherine Parkinson looks: