The Duke & Duchess Of Cambridge Attend Place2BeBig Assembly With Heads Together For Children's Mental Health Week [Getty Images]

LONDON, ENGLAND - FEBRUARY 06: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Place2Be Big Assembly With Heads Together for Children's Mental Health Week at Mitchell Brook Primary School on February 6, 2017 in London, England. (Photo by Chris Jackson/Getty Images)

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