mary louise parker jeffery dean morgan splash

After being down in the dumps because Billy Crudup ran off with Claire Danes when she was seven months pregnant, Mary-Louise Parker bounced back by dating "Weeds" co-star Jeffrey Dean Morgan (a.k.a. Denny Duckett on "Grey's Anatomy"). For two years the couple was on-again off-again and in April 2008, post-engagement, they called it quits. [People]