Catherine Middleton kept her wedding dress designer secret for months, but now the world knows it was Sarah Burton of Alexander McQueen! So who is Miss Burton? The 36-year-old designer took the helm of the McQueen label after the founding designer's untimely death early last year. She had worked for him for 14 years. Since then, Burton has carried on McQueen's tradition of elaborate, fashion-forward, and avant-garde pieces. Burton first sparked royal wedding dress interest in February after showing a collection full of white gowns at Paris Fashion Week (left). And that's not all. Find out where she studied, which other political women she dressed, and more about Sarah Burton of Alexander McQueen in the gallery.