William, Kate and Harry carry message on mental health to London Marathon

The young royals are campaigning to end stigma around mental health issues.

Their charity, Heads Together, is the Virgin London Marathon’s official charity partner this year and 700 runners are participating in support of mental health awareness. The royal trio gave hugs to some competitors ahead of the race and, after the event got underway, clapped, cheered and handed out water along the route.

WIlliam, Kate, and Harry dubbed the event the mental health marathon and many racers sported blue Heads Together headbands to support the cause. The young royals’ campaign to break the taboo surrounding mental health has had William, Kate, and Harry open up to the public about their own struggles. The normally stoic and reserved royals have shared some of their most intimate emotions to encourage others to seek help during moments of grief.

The fifth in line to the throne participated in a podcast with Bryony Gordon of The Telegraph newspaper. Prince Harry admitted shutting down all his emotions after his mother’s death. "My way of dealing with it was sticking my head in the sand, refusing to ever think about my mum, because, ‘Why would that help?’" he shared.

The young royals have worked with prominent doctors, educators and health care professionals across the spectrum as they engage in their most high-profile campaign to date

On Friday, William, Kate and Harry released a candid new video for their Heads Together campaign that shows them discussing some of the most personal issues they have faced, including parenting and coping with Princess Diana's death.

William, Kate and Harry 's foundation has vowed to carry on their message beyond the marathon to benefit any young people, parents or veterans struggling with mental health issues and other challenges.