Kate and Pippa at Wimbledon

Pippa Middleton, left, and her sister, Kate, Duchess of Cambridge, sit in the Royal Box during the men's final match between Roger Federer of Switzerland and Andy Murray of Great Britain on day 13 of the Wimbledon Lawn Tennis Championships on July 8, 2012, in London.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Credit: Clive Brunskill/Getty Images