At the Broadway press preview for Breakfast at Tiffany's in New York City on February 27, 2013.
Because the Game of Thrones star looks totally different—and totally incredible—without that platinum blonde wig! Her natural brunette hair colour is a zillion times more flattering, making her skin look all peaches and cream and bringing out her gorgeous blue-green eyes.
With these genetics as your foundation, you really don't have to do much. I love that her hair is all one tone and super-shiny, and she's wisely left her eyebrows full but groomed. (Notice the "fans" at the inner edges? So model-esque.) The finishing touch to play up all of this skin-hair contrasting business is a soft berry stain on the lips. Not too red, nor too pink, but just right.