A Look Back at Kate and Pippa Middleton’s Best Sister Moments

We could probably pinpoint April 29, 2011, as the exact date on which most of the world first became aware of Pippa Middleton. That day, of course, was the wedding of her sister, Kate, to Prince William. Pippa, who is a little less than two years younger than Kate, served as maid of honor. (The younger Middleton memorably stunned in a formfitting Alexander McQueen by Sarah Burton gown.) But the Duchess of Cambridge and Pippa, which is short for Philippa, have long shared a close bond. Both attended the Downe House School and later boarded at Marlborough College. Kate attended University of St. Andrews and Pippa studied at the University of Edinburgh, and the sisters both worked at their family’s business, Party Pieces, after graduation. Now, despite the Duchess of Cambridge’s various responsibilities, they still find time to spend together. Most recently, the pair celebrated the Christmas holiday along with the rest of the Middleton clan. And with Pippa’s wedding to James Matthews expected this Saturday, the siblings have a lot more to celebrate. Kate may not serve as a bridesmaid, but she will no doubt be with her younger sister on her big day. Above, a look back at Kate and Pippa Middleton’s sweetest sister moments.