Prince WIlliam, Duke of Cambridge and Catherine, Duchess of Cambridge leave St Mary's Hospital in London, UK after the birth of Prince George on July 23, 2013. (Photo by Zak Hussein/Corbis via Getty Images)
Prince WIlliam, Duke of Cambridge and Catherine, Duchess of Cambridge leave St Mary's Hospital in London, UK after the birth of Prince George on July 23, 2013. (Photo by Zak Hussein/Corbis via Getty Images)