He discussed the pain of his mom's passing in a letter to children who lost parents to COVID-19.

In a touching letter to children grieving the loss of a parent during the coronavirus pandemic, Prince Harry is reflecting on his own mother Princess Diana's untimely death. Harry, whose mom died in a car accident in 1997 when he was just 12 years old, discussed the pain of Diana's passing in the foreword of children's book Hospital by the Hill, which tells the story of a young person coping with the loss of their mother — a frontline worker.

"If you are reading this book, it's because you've lost your parent or a loved one, and while I wish I was able to hug you right now, I hope this story is able to provide you comfort in knowing that you're not alone," Harry began his emotional note, before reflecting on his personal experience with death.

He continued, "When I was a young boy I lost my mum. At the time I didn't want to believe it or accept it, and it left a huge hole inside of me. I know how you feel, and I want to assure you that over time that hole will be filled with so much love and support. We all cope with loss in a different way, but when a parent goes to heaven, I was told their spirit, their love and the memories of them do not. They are always with you and you can hold onto them forever. I find this to be true."

Earlier this month, Harry revealed a similar sentiment during his bombshell interview with Oprah. He said that he felt Diana's "presence throughout this whole process" while referencing his transition from the U.K. to the United States. "I think she saw it coming," Harry admitted. "I think she would feel very angry with how this has panned out, and very sad… But ultimately, all she'd ever want is for us to be happy."

In his foreword, Harry went on to describe the rollercoaster of emotions the children may be feeling during the grieving process, and his advice for coming out the other side. "You may feel alone, you may feel sad, you may feel angry, you may feel bad. This feeling will pass," he says. "And I will make a promise to you – you will feel better and stronger once you are ready to talk about how it makes you feel."

The duke concluded his note, writing: "I hope this book helps remind you of just how special your parent or loved one was. And how special you are too."