Kate Walsh, who plays Addison in Grey's Anatomy spin off series, 'Private Practice' is divorcing from her husband.

According to Entertainment Tonight, Walsh's husband Alex Young cites irreconcilable differences as the reason for the split after only 15 months of marriage.

Kate Walsh and Young, a film executive, tied the knot in September 2007 after just a few months of dating.

At the time, she told the US press, "I'm on cloud nine!"

Check out a sneak preview of next season's Private Practice now!