Britain's Prince William, Duke of Cambridge (R) and Britain's Catherine, Duchess of Cambridge, (L) arrive for a national service of thanksgiving for the Britain's Queen Elizabeth II's 90th birthday at St Paul's Cathedral in London on June 10, 2016, which is also the Duke of Edinburgh's 95th birthday. Britain started a weekend of events to celebrate the Queen's 90th birthday. The Queen and the Duke of Edinburgh along with other members of the royal family will attend a national service of thanksgiving at St Paul's Cathedral on June 10, which is also the Duke of Edinburgh's 95th birthday. / AFP / POOL / TOBY MELVILLE (Photo credit should read TOBY MELVILLE/AFP/Getty Images)
