It was only a matter of time before Keira Knightley and Sienna Miller became best friends - after all, they wear the same jeans, date the same rockers, and grace the same Grazia covers. So we weren't really surprised when Sienna Miller told the press at a recent "Mysteries of Pittsburgh" premiere that she wants Keira to be the face of Twenty8Twelve. The exact quote is really adorable: "Oh god Keira - I would love it. She's the face of Chanel so she's not likely to come and do my line. But she's my mate, so hopefully I'd get mates rates. I would definitely love Keira to do it. I love her face," It might get a little confusing if Keira's the face of Sienna's line - it would be like Richard Meier drawing blueprints for Phillipe Starck - but whatever. The celebrity knot would only catapult the line more, and open up future possibilities of mind-blowing weirdness - like, how about Mischa Barton for The Row? Rihanna for L.A.M.B.? Bueller? Bueller?