'No Rule Book': Young Royals Talk Mental Health, Parenthood and Diana's Death

It comes days after Kate told of her struggles with becoming a mother, saying it is "lonely" and she feels "isolated" at times. Prince Harry said. "What's the point in bringing up something that's only going to make you sad?"

But hosting duties weren't the only reason for their visit.

The royal trio are looking ahead to this weekend's 2017 Virgin Money London Marathon, in which a team of more than 700 runners are running on behalf of Heads Together.

She said young mums she had spoken to in the past had said talking about their feelings could be "like medicine". "That is the point".

It comes after Prince Harry opened up about nearly having a "complete" breakdown when his mother Princess Diana died.

You're amazingly close." (Thing we learned today: "Kate refers to the princes as "boys.") William's reply is equally tender: "We have been brought closer because of the circumstances", he says of his brother. "But then when I analyzed it I could see that the changes I'd made in the previous year had all caught up with me, and my body had said: "We want a rest".

'You know I've got in enough trouble with my dancing recently, so it's best to keep away from that, ' the future King added in reference to the photos of him on a ski trip to Verbier in March.

"Considering everything that you boys, obviously, sadly went through, the trauma that you experienced " Kate says, "I do think it's incredible how strong and how you've been and how you've been able to cope". It ain't going to change it.

Kate, who wore a red puffer jacket and black jeans, whisked her long hair back on the start line as William hilariously joked: "Oh my hamstring!".

Heads Together, the campaign launched by Harry and the Duke and Duchess of Cambridge, is the main charity partner for this year's London Marathon.

These are the people that can make a difference. "This is their opportunity to put closure on an issue, or this is their opportunity to be part of something incredible, and it's just really exciting for all of us to be a part of it". This is their opportunity to be part of something fantastic. [William] always said to me "you have got to sit down and think about those memories"'.

"Everybody in the marathon being given a headband".

Meanwhile, a former High Court judge has stated that Prince Harry's mental health problems may have been worsened by the failure of his parents relationship. "It's the one thing that binds everything together".

  • Salvatore Jensen