Grey's Anatomy actress Katherine Heigl wants to be a movie star, and she already has two big-screen hits to her credit (Knocked Up and 27 Dresses). But should she really leave Grey's (in the season finale, Izzy is on her deathbed)? Our advice: don't quit your day job, Kate! As a cautionary tale, here are seven actresses who left TV with high hopes of becoming silver-screen goddesses, only to end up ... back on TV. Or worse. Click through to view.
