LONDON, ENGLAND - OCTOBER 10: Prince William, Duke of Cambridge and Prince Harry arrive to celebrate World Mental Health Day with Heads Together at the London Eye on October 10, 2016 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - OCTOBER 10: Prince William, Duke of Cambridge and Prince Harry arrive to celebrate World Mental Health Day with Heads Together at the London Eye on October 10, 2016 in London, England. (Photo by Karwai Tang/WireImage)