Sienna Miller is a fashion chameleon, whose style changes with the seasons, so it is no surprise to see a bit of everything in the fall 2011 lookbook from Twenty8Twelve, the contemporary label she designs in partnership with her sister Savannah. If you want glamour, you will find lace dresses and sequined skirts. If you want a downtown cool vibe, you will find sweater dresses and printed rompers. If you want Parisian chic, you will find leopard-print frocks and fringe-embellished skirts. Plus, poet smocks, chunky knit cardigans, silk shorts, and more. In other words, everything a girl like Sienna needs to last her through fall. The fall 2011 collection is available now at stores like Shopbop and Nordstrom. For more images, click through.