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LONDON, ENGLAND - APRIL 04: Catherine, Duchess of Cambridge, and Kenneth Olisa attend the Opening Night Royal Gala performance of "42nd Street" in aid of the East Anglia Children's Hospice at the Theatre Royal Drury Lane on April 4, 2017 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)

LONDON, ENGLAND - APRIL 04:  Catherine, Duchess of Cambridge, and Kenneth Olisa attend the Opening Night Royal Gala performance of "42nd Street" in aid of the East Anglia Children's Hospice at the Theatre Royal Drury Lane on April 4, 2017 in London, England.  (Photo by David M. Benett/Dave Benett/Getty Images)