Brooke Burns was 22 in Shallow Hal when she played the character 'Katrina'.
That was over 21 years ago in 2001.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 45, and has starred in 24 movies in total, 23 of those since Shallow Hal was released.
In Shallow Hal, I think Brooke Burns looks: