Rebecca Hall, omg! She looked ah-ma-zing in Lanvin at the London premiere of Iron Man 3. You can never go wrong in black and you can never go wrong in Lanvin. And I am totally into jumpsuits right now so this for me is a major win. To be honest, I think it's a shirt and pants, but it looks like a jumpsuit so I am going to go with jumpsuit. Everything about this outfit works for me from the deep plunging neckline to the tapered leg. I love the bow around her waist adding a touch of feminity to the sexy look. Hall's makeup and hair is very simple and classic. Red lip, black outfit, simple jewels and a low bun are a recipe for success, always.