Decades later, the pain of Diana’s death is still very present in his life.
"You never get over it, it's such an unbelievably big moment in your life that it never leaves you. You just learn to deal with it,” he said.
William is using his experiences to raise his own two children, Prince George and Princess Charlotte, to be open about what they’re going through.
“Catherine and I are clear that we want both George and Charlotte to grow up feeling able to talk about their emotions and feelings,” he said of his wife, Kate Middleton, in a recent interview with CALM