LONDON, ENGLAND - APRIL 23: Catherine, Duchess of Cambridge hugs a runner as she hands out water during the 2017 Virgin Money London Marathon on April 23, 2017 in London, England. The Duke and Duchess of Cambridge and Prince Harry, are spearheading Heads Together, in partnership with eight leading mental health charities, that are tackling stigma, raising awareness, and providing vital help for people with mental health problems. (Photo by Chris Jackson - WPA Pool/Getty Images)