LONDON, UNITED KINGDOM - JULY 23:  Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall leave The Lindo Wing after visiting The Duke and Duchess Of Cambridge and their newborn son at St Mary's Hospital on July 23, in London, England.The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 81b 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)