The British royals are doing everything they can to improve the world's conversation about mental health, and that includes talking about it themselves. As part of Heads Together's "#OktoSay" series, Prince William, Kate Middleton, and Prince Harry recently sat down to talk about how the initiative has affected not only their community but their own lives as well. While Kate touched on how difficult it was being a first-time mother to Prince George, her husband opened up about his late mother, Princess Diana, and how the campaign has helped him and his brother cope with her death almost 20 years later. "We have been brought closer as a result of the circumstances," he said. "You are uniquely bonded because of what we've been through." Watch the rest of their eye-opening video above.