Watch: Harry accuses Royal Family of 'total silence and neglect' and says he turned to drink and drugs as an adult over Diana's death
Prince Harry has revealed his son Archie learned to say 'Grandma' soon after he was saying 'mama' and 'papa' because of a photograph of Diana in his nursery.
Harry, 36, has opened up about his journey through therapy in a documentary series called The Me You Can't See, which he produced with Oprah Winfrey.
""I have no doubt my mum would have been incredibly proud of me," he says on camera. "I'm living the life she wanted to live for herself.
"I wish she could have met Meghan, wish she was around for Archie," he adds.
"I’ve got a photo up in his nursery and one of his first words, apart from 'Mama, Papa', was 'Grandma, Grandma Diana'.
"It's the sweetest thing but it makes me really sad, because she should be here."
When Harry and Meghan gave an interview to Winfrey in March, they revealed Archie was "on a roll" with new words, including that one of his favourites at the time was "hydrate" and that he would tell people to "drive safe" when they left their home.
Harry also reveals how they are remembering his mother each day at home in California.
He says: "We have got a beautiful little boy, who keeps us busy, running around every day, two dogs, another little girl on the way - I never dreamt that.
"(We are) living the life she wanted us to be able to live."
"Not only do I know she's incredibly proud of me, but she’s helped me get here," he goes on.
"I’ve never felt her presence more (than) I have done over the last year."
Watch: Prince Harry blames BBC interview for contributing to his mother's death
Meghan is expecting the couple's second child, a daughter, this summer. The little girl will be the 11th great-grandchild for the Queen.
Harry's series with Winfrey covers his own mental health journey, even showing him taking on a session via video call during the pandemic.
In the session, he finds out why flying into London causes feelings of anxiety, linking it back to the first time he returned to the city as a teenager after his mother had died.
The royal had spent two weeks in Africa after her death and enjoyed the escapism, leading to feelings of dread when he returned.
He says in the programme: "I’m on my way to having healed that part of my life, those younger years.
"Having a clarity of perspective that I never ever thought I would get.
"I’m still the person I was, but I’m a better version of that.
Harry concludes, "I feel as though this was always meant to be."
The Me You Can't See is available now on Apple TV.