LONDON, ENGLAND - JULY 23:  Catherine, Duchess of Cambridge carrying her newborn son departs the Lindo Wing of St Mary's Hospital with Prince William, Duke of Cambridge on July 23, 2013 in London, England. Catherine, Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William, Duke of Cambridge at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Karwai Tang/WireImage)