Prince Harry reveals in his forthcoming memoir that he genuinely believed his mother, Princess Diana , had faked her own death, according to a report.

In passages from Spare obtained by Page Six , the Duke of Sussex, who was 12 when Diana died in a Paris car crash, recalled the idea taking shape:

With nothing to do but roam that castle and talk to myself, a suspicion took hold, which then became a firm belief. This was all a trick.

The book reportedly continues:

And for once the trick wasnt being played by the people around me, or the press, but by Mummy. Her lifes been miserable, shes been hounded, harassed, lied about, lied to. So shes staged an accident as a diversion and run away.

The young prince and his brother, Prince William , were in Scotland at Balmoral Castle with grandparents Queen Elizabeth II and Prince Philip when Dianas vehicle driven by chauffeur Henri Paul crashed in a Paris tunnel while escaping a horde of paparazzi.

Diana, 36, died on Aug. 31, 1997, alongside Paul and her boyfriend Dodi Fayed . Only her bodyguard Trevor Rees-Jones survived the crash.