Sienna Miller had another evening at the theater in London yesterday performing in Flare Path. She rocked a familiar green jacket in the latest installment of what's becoming her nightly post-show fashion parade. She's incorporated pieces from her own Twenty8Twelve collection into the mix after launching a recent pop-up shop at Selfridges with her sister Savannah. The girls have since moved the department store display over to their shop in West London, and all the hustling keeps both Sienna and Savannah quite busy. Sienna loves the family time though, recently telling British Vogue, "The night before Savannah got married I cried my eyes out because I knew it meant we'd never live together again. This business means we get to see more of each other and work on something we both enjoy."