LONDON, UNITED KINGDOM - JULY 23: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave the Lindo Wing of St. Mary's hospital with their newborn son on July 23, 2013 in London, England. (Photo by Anwar Hussein/WireImage)
LONDON, UNITED KINGDOM - JULY 23: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave the Lindo Wing of St. Mary's hospital with their newborn son on July 23, 2013 in London, England. (Photo by Anwar Hussein/WireImage)