Britain's Catherine, Duchess of Cambridge, arrives to attend a national service of thanksgiving for the 90th birthday of Britain's Queen Elizabeth II 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 / Alex Lentati (Photo credit should read ALEX LENTATI/AFP/Getty Images)
