LONDON, ENGLAND - OCTOBER 10: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attends Celebrate World Mental Health Day at London Eye on October 10, 2016 in London, England. (Photo by Luca Teuchmann/WireImage)
LONDON, ENGLAND - OCTOBER 10: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attends Celebrate World Mental Health Day at London Eye on October 10, 2016 in London, England. (Photo by Luca Teuchmann/WireImage)