The night before their fairy-tale wedding, Prince Charles delivered a “devastating” blow to Princess Diana.

According to the late royal’s astrologer, the Prince of Wales informed Princess Diana that “he didn’t love her the night before their wedding.”

The allegation is part of a new ITV documentary, The Diana Interview: Revenge of a Princess, which examines the repercussions from Diana’s notorious 1995 Panorama interview, in which she stated, “there were three of us in this marriage,” alluding to Charles’ lover-now-wife, Camilla Parker-Bowles.

According to astrologer Penny Thornton, with whom the Princess of Wales started consulting in 1986, Prince Charles made the comments before their wedding in 1981 because he didn’t ‘want to go into their marriage on a false premise’.

“One of the most shocking things that Diana told me was that the night before the wedding Charles told her that he didn’t love her,” Thornton stated. “I think Charles didn’t want to go into the wedding on a false premise. He wanted to square it with her and it was devastating for Diana.”

Diana “didn’t want to go through with the wedding” at that time, according to the astrologer, and even contemplated “not attending.”

The documentary’s central claim is that Martin Bashir, who interviewed Diana for the BBC’s Panorama, presented the princess’s brother Charles Spencer doctored bank records, suggesting that the head of his security was getting money for information about Diana.

When Bashir asked Princess Diana whether Camilla was a “factor” in the marriage’s demise, Diana said, “Well, there were three of us in this marriage, so it was a bit crowded.” The shockingly honest remark quickly went viral.

Diana’s brother has also accused the BBC of obtaining the interview using forged papers.

On the 25th anniversary of Britain tuning in to see Diana pour her heart out on national television, these two programs hear from people who saw her fairytale romance with Prince Charles devolve into anger and, eventually, divorce.

In another segment of the documentary, royal photographer Ken Lennox called Charles “atrocious” for abandoning Diana to play Polo only minutes after she gave birth to their son, Prince Harry.

The show also features James Colthurst, an Irish-born medical practitioner who was Diana’s close friend while she worked as a nanny in London before marrying Prince Charles.

‘I remember she was becoming more and more incensed by what was going on and the fact that the whole organisation, as she saw it, was helping to support the relationship between Camilla and Prince Charles.

James says ‘She would have moments of extreme anger and wanting to bash the mattress with the tennis racquet and that kind of thing, and I said, “Well, I think there are ways of lancing the abscess.’