Age: 38
Occupation: Creative director, Alexander McQueen
If Kate Middleton's fashion choices inspire racks of knockoffs, the influence begins with Burton, who has remained the unofficial designer for the Duchess after creating her wedding gown in 2011. When not dressing the Duchess and her sister Pippa Middleton, Burton serves as creative director at Alexander McQueen, a role she assumed after McQueen committed suicide in February 2010.