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Britain's Kate Duchess of Cambridge, 2nd left, stands next to Prince Harry, left Prince William, 3rd left, and Queen Elizabeth as they watch the proceeding onboard the Royal barge during the Queen's Diamond Jubilee Pageant on the River Thames in London Sunday June 3, 2012. More than 1,000 boats will sail down the River Thames on Sunday in a flotilla tribute to Queen Elizabeth II's 60 years on the throne that organizers are calling the biggest pageant on the river for 350 years. (AP Photo/Dylan Martinez, Pool)

Britain's Kate Duchess of Cambridge, 2nd left, stands next to Prince Harry, left Prince William, 3rd left, and Queen Elizabeth as they watch the proceeding onboard the Royal barge during the Queen's Diamond Jubilee Pageant on the River Thames in London Sunday June 3, 2012. More than 1,000 boats will sail down the River Thames on Sunday in a flotilla tribute to Queen Elizabeth II's 60 years on the throne that organizers are calling the biggest pageant on the river for 350 years. (AP Photo/Dylan Martinez, Pool)

Britain's Prince Harry

Prince Harry became an uncle on July 22, 2013 after sister-in-law Catherine, the Duchess of Cambridge, gave birth to a son, Prince George Alexander Louis. The newest prince replaces Harry as the third in line to the British throne.