Catherine, Duchess of Cambridge, Princess Charlotte, Prince George, Prince William, Duke of Cambridge stand on the balcony during the Trooping the Colour, this year marking the Queen&#x27;s official 90th birthday at The Mall on June 11, 2016 in London, England. The ceremony is Queen Elizabeth II&#x27;s annual birthday parade and dates back to the time of Charles II in the 17th Century when the Colours of a regiment were used as a rallying point in battle.