Duchess Kate at the Olympics

Kate, Duchess of Cambridge, celebrates with Team GB after their women's hockey bronze medal match against New Zealand during the London 2012 Olympic Games at Riverbank Arena Hockey Centre on Aug. 10, 2012 in London.

Kate, Duchess of Cambridge, center, celebrates during the women's hockey bronze medal match between New Zealand and Great Britain during the London 2012 Olympic Games at Riverbank Arena Hockey Centre on Aug. 10, 2012, in London.

Kate, Duchess of Cambridge, claps as Nicola Adams of Great Britain competes against Cancan Ren of China during the women's fly (51kg) boxing final bout at the London 2012 Olympic Games on Aug. 9, 2012, in London.

Kate, Duchess of Cambridge, talks to young athletes at Team GB House in the Westfield Centre during the London 2012 Olympic Games on Aug. 9, 2012, in London.

Prince Albert II of Monaco, back center, Kate, Duchess of Cambridge, front center, and official Team GB ambassador Robin Cousins, front right, watch synchronized swimming during the London 2012 Olympic Games at the Aquatics Centre on Aug. 9, 2012, in London.

Kate, Duchess of Cambridge, watches synchronized swimming during the London 2012 Olympic Games at the Aquatics Centre on Aug. 9, 2012, in London.

Kate, Duchess of Cambridge, waves during the women's hockey semifinal between Argentina and Britain at the Riverbank Arena in the Olympic Park in London on Aug. 8, 2012, during the London 2012 Olympic Games.

Kate, Duchess of Cambridge, meets with members of the Team GB sailing squad during the London 2012 Olympic Games at Weymouth Harbour on Aug. 6, 2012, in Weymouth, England.

Kate, Duchess of Cambridge, watches the women's laser radials sailing race during the London 2012 Olympic Games at Weymouth Harbour on Aug. 6, 2012, in Weymouth, England.

Prince William and Kate, Duchess of Cambridge, talk with Prince Harry as they attend the men's 100-meter final during the London 2012 Olympic Games on Aug. 5, 2012, in London.

Kate, Duchess of Cambridge, applauds during the women's handball preliminaries match between Great Britain and Croatia at the Copper Box in London on Aug. 5, 2012, during the London 2012 Olympic Games.

Kate, Duchess of Cambridge, watches the artistic gymnastics men's pommel horse final during the London 2012 Olympic Games at North Greenwich Arena on Aug. 5, 2012, in London.

British gymnast Beth Tweddle, left, and Kate, Duchess of Cambridge, watch gymnastics during the London 2012 Olympic Games on Aug. 5, 2012, in London.

Kate, Duchess of Cambridge, center, cheers with gymnasts Kristian Thomas, second left, Jennifer Pinches, left, and Rebecca Tunney, right, during the artistic gymnastics men's pommel horse final at North Greenwich Arena on Aug. 5, 2012 in London, during the London 2012 Olympic Games.

From left, Kate, Duchess of Cambridge, Prince William, and Britain's Prime Minister David Cameron attend the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012, in London.

Kate, Duchess of Cambridge, and Prince William cheer on track and field athlete Mo Farah of Great Britain during the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012, in London.

Kate, Duchess of Cambridge, and Prince William watch the swimming finals session during the London 2012 Olympic Games at the Aquatics Centre on Aug. 3, 2012, in London.

Prince William, Kate, Duchess of Cambridge, and British Culture Secretary Jeremy Hunt react during the women's 800-meter freestyle final during the London 2012 Olympic Games on Aug. 3, 2012, in London.

Kate, Duchess of Cambridge, center, watches hockey during the London 2012 Olympic Games at Riverbank Arena on Aug. 3, 2012, in London.

Kate, Duchess of Cambridge, and Prince William cheer while watching track cycling during the London 2012 Olympic Games at Velodrome on Aug. 2, 2012, in London.

Kate, Duchess of Cambridge, Prince William and Prince Harry watch track cycling during the London 2012 Olympic Games at Velodrome on Aug. 2, 2012, in London.

Prince William and Kate, Duchess of Cambridge, do the wave during the match between Andy Murray of Great Britain and Nicolas Almagro of Spain in the quarterfinal of men's singles tennis during the London 2012 Olympic Games at Wimbledon on Aug. 2, 2012, in London.

Kate, Duchess of Cambridge, speaks with Great Britain cyclist Victoria Pendleton during a visit to the Team GB accommodation flats in the Athletes Village at the Olympic Park in Stratford during the London 2012 Olympic Games on July 31, 2012, in London.

From left, Prince William, Kate, Duchess of Cambridge, and Prince Harry look on during the show jumping equestrian event at the London 2012 Olympic Games at Greenwich Park on July 31, 2012, in London.

Prince William, Kate, Duchess of Cambridge, and Prince Harry look on during the show jumping equestrian event at the London 2012 Olympic Games at Greenwich Park on July 31, 2012 in London.

Camilla, Duchess of Cornwall, left, and Kate, Duchess of Cambridge, watch the cross country equestrian event during the London 2012 Olympic Games at Greenwich Park on July 30, 2012, in London.

Kate, Duchess of Cambridge, and Prince William watch the cross country equestrian event during the London 2012 Olympic Games at Greenwich Park on July 30, 2012, in London.

First lady Michelle Obama greets Kate, Duchess of Cambridge, as U.S. Ambassador Louis Susman looks on during a reception at Buckingham Palace for heads of state and government attending the Olympics opening ceremony on July 27, 2012, in London.

Prince William, Duke of Cambridge, and Kate, Duchess of Cambridge, attend the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012, in London.

Prince William, Kate, Duchess of Cambridge, and Prince Harry watch Wai-Ming hand over the London 2012 Olympic Torch to John Hulse during a visit to Buckingham Palace during the London 2012 Olympic torch relay on July 26, 2012, in London.