Princess Diana previously teamed up with royal biographer to share details about her personal life.

At first, royal biographer Andrew Morton didn’t want to reveal the information that the Princess of Wales shared with him. But following Princess Diana’s death, he felt the need to do so because he wanted royal fans to know the truth about the late royal.

Diana: Her True Story – In Her Own Words” immediately became one of the most popular memoirs about Prince Charles’ ex-wife. But the book was also surrounded by tons of controversies.

While Princess Diana was being interviewed by Morton, she came up with a clever nickname to make sure that no one would suspect that they were talking about the royal family, her sons, and even her marriage.

Morton, later on, revealed, that Princess Diana referred to him as Noah. She came up with the nickname after reading about a feature on Morton on an American publication.

While speaking with The Independent, Morton said that he was once described as a “notable author and historian.” And Princess Diana used the acronym to create the nickname Noah.

Meanwhile, Morton described what it was like interviewing Princess Diana. In the documentary “Royals at War,” he said that Princess Diana sounded like a prisoner while she was sharing her stories.

“She was absolutely miserable and she felt she was like a prisoner of the palace. She felt she needed to speak out… I put my headphones on, switched on the tape recorder, and out came this cascade of emotion…. She was speaking like a prisoner in a cell who just had a few minutes to get the story out,” he said.

Shortly after Morton’s interview with Princess Diana, the People’s Princess passed away following a fatal car crash in Paris. Today, Prince William and Prince Harry are expected to commemorate their mom’s 22nd death anniversary by visiting her grave in Althorp with their wives and children.

Princess Diana
Pictured: Princess Diana wearing a Jasper Conran suit during a visit to a community centre in Brixton, October 1983. Getty Images/Princess Diana Archive