She also dated actor Jason Behr from 1999 to 2002.
Her mother is of German descent and her father is of Swiss-German and Irish descent.
At the same time, Katherine learned to play the cello and began acting in films.
She has magnetic figure and looks very lusty on screen.
She is the youngest of four children of Paul Heigl, who was a financial accountant and executive and Nancy, who was a manager.
In September of 2009, they adopted a daughter from South Korea.