English actress Gemma Arterton looked every inch the princess at the London premiere of her new movie Prince of Persia: The Sands of Time. Wearing an incredible Valentino Pre-Fall '10 embellished gown, Gemma kept her accessories simple to let the detailed dress speak for itself. I'm not usually one for pouffy-styles but this is undeniably impressive. Look closely and you'll notice the intricate leaf detailing and sparkly beading. So beautiful! Do you rate it?