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Britain's Prince William, Prince Harry and his fiancee Meghan Markle arrive at a Service of Thanksgiving and Commemoration on ANZAC Day at Westminster Abbey in London

Britain's Prince William, Prince Harry and his fiancee Meghan Markle arrive at a Service of Thanksgiving and Commemoration on ANZAC Day at Westminster Abbey in London, April 25, 2018. Kirsty Wigglesworth/Pool via Reuters

Royals William and Kate in Singapore

Britain's Prince William and his wife Catherine arrive in Singapore Tuesday, kicking off a nine-day Southeast Asian and Pacific tour marking Queen

Elizabeth II's Diamond Jubilee.