Few people knew the truth about Princess Diana's marriage. In 1991, Prince Charles had rekindled his relationship with Camilla Parker Bowles and Princess Diana was suffering from an eating disorder trying to cope with her life as a Royal.
In strict secret she decided to make her side of the story public by recording her thoughts for author Andrew Morton.
His book Diana: Her True Story, is being republished for the 20th anniversary of her death, along with the transcripts of those tapes she made in secret.
It all started just 2 days before their fairytale wedding that took place in front of a global audience of 750 million people.
"We got married on Wednesday. On the Monday (July 27, 1981), we had gone to St Paul's for our last rehearsal, and that's when the camera lights were on full and I got a sense of what the day was going to be.
And I sobbed my eyes out. I absolutely collapsed and it was because of all sorts of things. The Camilla thing rearing its head the whole way through our engagement," the transcript revealed.
Find out what the tapes revealed about the Royal wedding on the next page.