Sienna Miller @ Twenty8Twelve Launch

Sienna Miller puts on her top hat and launches her British rock chick fashion line, Twenty8Twelve (named after her birthday), with older sister Savannah and Holt Renfrew President and CEP Caryn Lerner on Friday in Toronto, Canada.

This celebrity line is apparently different than the rest as Savannah is an actual fashion designer: “She paid her dues working with British tailoring star Alexander McQueen and knitwear wonder Julien Macdonald. Sienna‘s role is creative director. The star assured readers of British Vogue that she meets with her sister each month to discuss the line, her time at such a premium that she is sometimes whisked from set by helicopter.”

15+ pictures inside of Sienna‘s launch of Twenty8Twelve…