Keira: At parties, I stand on my own, grinning aimlessly. I can never think of a thing to say. I wish I was Sienna Miller. I watch that girl and she is just fabulous. She talks to everyone and laughs and smiles. She looks as if she is genuinely enjoying herself. When I talk to her, I hope a bit of her party personality will rub off on me but it never does. She could give master classes in being the most amazing party guest.