CHELTENHAM, UNITED KINGDOM - MARCH 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge attends Day 4 of The Cheltenham Festival at Cheltenham Racecourse on March 15, 2013 in London, England. (Photo by Indigo/Getty Images)
CHELTENHAM, UNITED KINGDOM - MARCH 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the racing as they attend Day 4 of The Cheltenham Festival at Cheltenham Racecourse on March 15, 2013 in London, England. (Photo by Indigo/Getty Images)
CHELTENHAM, UNITED KINGDOM - MARCH 15: Catherine, Duchess of Cambridge attends day 4 of the Cheltenham Festival on Gold Cup Day at Cheltenham racecourse on March 15, 2013 in London, England. (Photo by Samir Hussein/WireImage)
