Ever since her sister Kate Middleton married Prince William, Pippa Middleton has been in the spotlight. This weekend, however, it’s her turn to walk down the aisle. For the occasion, the bride wore a couture Giles Deacon wedding dress. It’s far more ornate than the now-iconic Alexander McQueen bridesmaid dress she wore to Kate and William’s wedding six years ago, but speaks to the elegant, preppy style Middleton has honed over the past few years. While she may share a preppy, relaxed flair with her sister, Pippa has a style all her own, regularly playing with shorter skirt lengths thank Kate and even a plunging neckline. But it’s never inappropriate for the sister of a princess–Pippa Middleton has mastered the art of looking poised even in the most casual of ensembles. Here, a look back at the British socialite’s 15 best fashion moments over the years.