(L-R) Britain's Prince William, Duke of Cambridge, Britain's Catherine, Duchess of Cambridge, US actress Meghan Markle and her fiancee Britain's Prince Harry attend a Commonwealth Day Service at Westminster Abbey in central London, on March 12, 2018.
Britain's Queen Elizabeth II has been the Head of the Commonwealth throughout her reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom. / AFP PHOTO / POOL / Paul Grover        (Photo credit should read PAUL GROVER/AFP/Getty Images)
Britain's Prince William (R), Duke of Cambridge and his wife Catherine, Duchess of Cambridge (C) watch as US actress Meghan Markle (L) and her fiancee Britain's Prince Harry arrive for a Commonwealth Day Service at Westminster Abbey in central London, on March 12, 2018. - Britain's Queen Elizabeth II has been the Head of the Commonwealth throughout her reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom. (Photo by Daniel LEAL-OLIVAS / AFP)        (Photo credit should read DANIEL LEAL-OLIVAS/AFP via Getty Images)