Although her latest flick Blue Valentine has a few rather risqué scenes—the reason the film received its NC-17 rating—the actress was the picture of innocence at the New York premiere this week. Stepping out in an adorable Azzaro spring ’11 number, the starlet channeled her inner ingénue. With a megawatt embellished bodice and tiered silk skirt, the frock was perfectly accented with a velvet black bow that finished off the darling ensemble. Adding a nice contrast to her cutesy get up, the platinum beauty spiced up her PG look with a pair of soaring sultry Charlotte Olympia platform pumps. The film is already generating major Oscar buzz and if this is a preview of what’s to come from Williams on the red carpet we are very excited.