SMILLERGREY090807_04.jpgSienna Miller SMILLER090807_01.jpgSienna Miller may have a reputation for outrageousness, but when we ran into her on over the weekend she was as quiet as a churchmouse! The international socialite was all quiet smiles and demure outfits all day on Saturday as she made her way to and from the airport and the Beverly Wilshire. Of course, given that she's in town to launch her clothing line in style, a little restraint might have been in order!