Britain's Prince William and Kate, the Duchess of Cambridge attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Prince Charles and Kate, the Duchess of Cambridge attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Prince William, Kate, the Duchess of Cambridge and Prince Harry attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Kate, the Duchess of Cambridge attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Kate, the Duchess of Cambridge attends a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Kate, the Duchess of Cambridge talks to guests during a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Prince William, Kate, the Duchess of Cambridge and Prince Harry, right, attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)
Britain's Prince William and Kate, the Duchess of Cambridge attend a reception at Buckingham Palace, London, to celebrate World Mental Health Day, Tuesday Oct. 10, 2017. (Heathcliff O'Malley/pool via AP)