The duke broke down in an episode of his and Oprah Winfrey produced docuseries which is focused on bringing out mental health and emotional well-being with stories from people around the world.
According to People magazine, Prince Harry made the revelation about little Archie's first words in the new AppleTV+ docuseries 'The Me You Can't See', co-created by Oprah Winfrey and the Duke of Sussex.
The nearly three-minute-long trailer opens with Oprah and the Duke of Sussex chatting about the mental health crisis around the world and how people are suffering from different issues related to mental health as well as the struggles surrounding it.
Winfrey recently appeared on Nancy O'Dell's new show, 'TalkShopLive', during which she reflected on the jaw-dropping interview, watched by nearly 50 million people worldwide.
Prince Harry, whose mother Princess Diana died in a car accident in Paris with her alleged beau and film producer Dodi Fayed, on August 31, 1997, said that the uncertain death of his mother "left a huge hole inside of him."
"The second date I was starting to think 'Wow, this is pretty special,'" Harry told Corden.
"It was just the fact we hit it off with each other and we were just so comfortable in each other's company," he said.