Which Grey's Anatomy Star Rocks This Huge Engagement Ring? (PHOTOS) 2 of 2 Previous Autoplay Next Share Tweet June 19, 2013 at 04:39PM EDT by Alissa Kombert Related: Grey's Anatomy full size Credit: Kevin Winter/ Getty Images Katherine Heigl's Ring It's former Grey's star,Katherine Heigl (Izzie Stevens). Her now hubby, Josh Kelley, gave her this 3-carat, pear-cut diamond ring when they got engaged in 2006. For their wedding, Josh added a diamond-and-sapphire eternity band to the ring. Now that's a good husband!