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Britain's Catherine, Duchess of Cambridge (2L) and Prince William, Duke of Cambridge (L) talk with members of staff and volunteers during a visit to a mental health charity helpline operated by YoungMinds in London on August 25, 2016. The Duke and Duchess of Cambridge visited a helpline service run by one of the eight charity partners of Heads Together. (Photo by Arthur Edwards / POOL / AFP via Getty Images)

Britain's Catherine, Duchess of Cambridge  (2L) and Prince William, Duke of Cambridge (L) talk with members of staff and volunteers during a visit to a mental health charity helpline operated by YoungMinds in London on August 25, 2016. The Duke and Duchess of Cambridge visited a helpline service run by one of the eight charity partners of Heads Together. (Photo by Arthur Edwards / POOL / AFP via Getty Images)