Actor Sienna Miller speaks to ELLE UK about being catapulted to fame in her twenties, being underestimated as an actor, and feeling happier than ever... Thank you @siennathing EIC @kenyahunt Acting EIC @alicewignall Creative Director @tom_houseofusher Fashion Director @avrilmair Talent Director @lottielumsden Picture Director @izzyparrylewis Photographer @tomschirmacher Stylist @charlesvarenne Makeup @jennycoombsmakeup Hair @georgenorthwood Nails @michelleclassnails