Never-before-seen footage of Diana, Princess of Wales -- who died 20 years ago next month -- will soon be aired on British television.
The footage, which was originally recorded by voice coach Peter Settelen at Kensington Palace in 1992 and 1993, contains a series of explosive revelations -- among them, Princess Diana’s sex life with Prince Charles and his ongoing affair with Camilla Parker Bowles.
The ‘People’s Princess,’ as she lovingly became known, describes her relations with the future-king as “odd.”
"Well, there was. There was, there was," she says. "But it was odd, very odd… Instinct told me. It was just so odd. I just don’t know. There was never a requirement for it from [sic] his case. Sort of once every three weeks…But it was there, it was there and then it fizzled out about seven years ago..."
She adds: "I kept thinking it followed a pattern.”
"He used to see his lady once every three weeks before we got married," she says, referring to his highly-publicised affair with Camilla Parker-Bowles. "If I could write my own script I would have my husband go away with his woman and never come back."
In another section of the tapes, Diana explains she only met Charles 13 times before their wedding in 1981 -- an event which she reportedly referred to as “the worst day of her life.”
"He'd ring me up every day for a week and then he wouldn’t speak to me for three weeks. Very odd," she recalls in the video. "And the thrill when he used to ring up was so immense and intense."
WATCH: Prince Charles and Princess Diana give a pre-wedding interview. Post continues after the video...
The much-loved royal also opens up about her rumoured affair with bodyguard Barry Mannakee. She rejects the idea they had sex, but does admit she held strong feelings for him.
“I fell deeply in love with someone who worked in this environment…And he was the greatest fella I’ve ever had," she says.
Mannakee is widely believed to have died in a motorcycle accident, however Diana believes her former police escort was murdered.
"He was killed — I think he was bumped off," she says.
The footage, which was unearthed back in 2001 following a police raid at former butler Paul Burrell's residence, will comprise the focal point of the upcoming Channel 4 feature, Diana: In Her Own Words.
The decision to air the tapes will likely be widely criticised, as they were never intended for public broadcast -- in fact, the tapes were shown once in America in 2004 but were considered so controversial they were never shown in Britain.
However, the broadcaster has decided to air the controversial offering as Princes William and Harry have begun to openly discuss their mother’s passing.
William, now a parent himself, has previously explained their unprecedented decision to speak candidly.
“Twenty years on Harry and I felt it was an appropriate time to open up a bit more about our mother. We have never spoken so publicly about her and we felt this was the right time to do it,” he said in the recent documentary Diana, Our Mother: Her Life and Legacy.
William was just 15 and Harry only 12, when their beloved mother, Diana, Princess of Wales, was tragically killed in a car crash in Paris on 31 August 1997.
She was just 36.