Patricia Clarkson was 26 in The Untouchables when she played the character 'Catherine Ness'.
That was over 37 years ago in 1987.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 64, and has starred in 83 movies in total, 81 of those since The Untouchables was released.
In The Untouchables, I think Patricia Clarkson looks: