Prince William, Catherine and Prince Harry are working together to support the Heads Together mental health charity campaign, which is the 2017 Virgin Money London Marathon Charity of the Year. The campaign hopes to change the national conversation on mental wellbeing, and is working in partnership with various charities including Place 2 Be, of which the Duchess is patron.
The close-knit trio filmed a campaign video in the garden of Kensington Palace, in which they can be seen laughing and joking, and talking candidly. In one piece to camera, the Duchess of Cambridge says: "Mental health is just as important as physical health."
This project is the biggest one that the three royals have undertaken together. We're touched by the video, which not only supports a great cause, but shows just how close the couple are to William's younger brother.
After nearly 5 years of marriage, the Duke and Duchess couldn't appear stronger. Click through to look at their fairytale relationship in pictures...