Kate Middleton
Credit: Chris Jackson-Pool/Getty Images

Catherine, Duchess of Cambridge, isn't just a royal—she's also an athlete! The Duchess, who has been a member of rowing, field hockey and cross country running teams, just signed up with Prince William to run a mile-long race through central London as part of a Sport Relief charity event this March. We can't wait to see her royal running gear! In the meantime, click through the gallery to see Duchess Catherine's most memorable outfits.