LONDON, April 26, 2018 (AP) — It's a family affair: Britain's royal officials say Prince Harry has asked elder brother Prince William to be best man at his wedding next month. Kensington Palace said Thursday that William is "honoured" to be playing the key role when Harry marries US actress Meghan Markle at Windsor Castle on May 19. Harry was best man when William married Kate Middleton at Westminster Abbey in 2011. Photo shows Britain's Prince William, left, Prince Harry and Meghan Markle attend a Service of Thanksgiving and Commemoration on ANZAC Day at Westminster Abbey in London, on Wednesday.