Kate and Pippa at Wimbledon

Kate, Duchess of Cambridge, and her sister, Pippa Middleton, arrive in the Royal Box before 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 at the All England Lawn Tennis and Croquet Club on July 8, 2012, in London.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Kate, Duchess of Cambridge, and her sister, Pippa Middleton, arrive in the Royal Box before 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 at the All England Lawn Tennis and Croquet Club on July 8, 2012, in London.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Kate, Duchess of Cambridge, right, and her sister, Pippa Middleton, watch from the Royal Box during the men's final match between Roger Federer of Switzerland and Andy Murray of Great Britain on day 13n of the Wimbledon Lawn Tennis Championships on July 8, 2012, in London. Murray lost to Federer, who took his seventh Wimbledon title.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Pippa Middleton, left, and 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 at the All England Lawn Tennis and Croquet Club on July 8, 2012, in London.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

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

Kate, Duchess of Cambridge, and her sister, Pippa Middleton, left, watch from the Royal Box before the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament on July 8, 2012.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Pippa Middleton, front left, and Kate, Duchess of Cambridge, center, sit in the Royal Box during the man'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

Kate, Duchess of Cambridge, and her sister, Pippa Middleton, left, react while watching the action from the Royal Box of the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament on July 8, 2012, in London.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Kate, Duchess of Cambridge, and her sister, Pippa Middleton, watch from the Royal Box during the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament on July 8, 2012.

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Kate, Duchess of Cambridge, and her sister Pippa Middleton, left, watch from the Royal Box during the men's singles 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

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

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

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

Pictures: Kate, Duchess of Cambridge
Pictures: Pippa Middleton

Pippa Middleton, left, and Kate, Duchess of Cambridge, sit in the Royal Box during the men's singles 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

British Prime Minister David Cameron, his mother, Mary Cameron, Kate, Duchess of Cambridge, and Pippa Middleton sit in the Royal Box during the men's singles 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