Britain's Prince William, Duke of Cambridge (L), his wife Britain's Catherine, Duchess of Cambridge, arrive to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
