(L-R) Britain's Catherine, Duchess of Cambridge holding her daughter Princess Charlotte, Prince George, Britain's Prince William, Duke of Cambridge, Britain's Prince Harry and Britain's Queen Elizabeth II stand on the balcony of Buckingham Palace to watch a fly-past of aircrafts by the Royal Air Force, in London on June 11, 2016. Trooping The Colour and the fly-past are part of a weekend of events to celebrate the Queen's 90th birthday. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
