Sienna Miller's sister Savannah looks effortlessly stylish in black pinstripe suit as she attends fashion launch

Sienna Miller's sister Savannah cut a stylish figure as she attended the launch of Matthew Williamson's new collection with Ruggable at Old Sessions House in London. Savannah, who is three years older than her actress sister, added height to her frame with a pair of black boots and carried a matching handbag. Sienna Miller's sister Savannah cut a stylish figure as she attended the launch of Matthew Williamson's new collection with Ruggable at Old Sessions House in London The fashion designer, 45, opted for a black pinstripe blazer along with matching trousers for the event Savannah attended Central Saint Martin's College Of Art And Design where she graduated with a BA in Fashion and Knitwear. Savannah, who is three years older than her actress sister, added height to her frame with a pair of black boots and carried a matching handbag Savannah's first fashion jobs were with Alexander McQueen and Matthew Williamson before she created the label Twenty8Twelve with Sienna The American Sniper star welcomed their daughter, whose name she has not revealed, in January.