Prince Charles, Camilla Parker Bowles
Prince Charles didn't want Camilla's wedding to Andrew Parker Bowles to push through. Pictured: Prince Charles, Camilla arrive at Seymour airport in Baltra island, in the Gapalagos archipelago on March 15, 2009. Getty Images/Rodrigo Buendia/AFP

Prince Charles was so devastated when he learned that Camilla Parker Bowles and Andrew Parker Bowles were engaged that he reportedly tried to stop their marriage.

Royal author Penny Junor wrote in “The Duchess: The Untold Story” that Prince Charles had one last-ditch attempt to get Camilla to change her mind at that time.

Prince Charles wrote a letter to Camilla and asked her straight away not to marry Bowles, but she still pushed through with the nuptials. Prince Charles found out about Camilla and Bowles’ plans to tie the knot after the Duchess of Cornwall also wrote a letter to him while he was in the West Indies.

The Duke of Cornwall was so devasted to hear the news from Camilla, but he couldn’t really do much about it because Camilla wasn’t regarded as a suitable bride for the heir to the throne. Prince Charles was expected to marry a virgin and someone who had a more aristocratic background like Princess Diana.

Junor also said in her book that Prince Charles sent out anguished letters to his friends and shared with them his real feelings about Camilla marrying Bowles. Prince Charles also called the ex-couple’s engagement “cruel.”

“It seemed to him particularly cruel, he wrote in one letter, that after ‘such a blissful, peaceful, and mutually happy relationship,’ fate had decreed and it should only last a mere six months. He had no one to go back to in England,” Junor said.

But luckily for Prince Charles, he found his way back into Camilla's arms years later. Even though Prince Charles was still married to Princess Diana at that time, he already had an affair with Camilla. Princess Diana also knew about the couple’s romance even before she wed Prince Charles.

In the 1994 documentary “Charles: The Private Man, The Public Role,” Prince Charles admitted that he was not faithful to Princess Diana after their marriage became irretrievably broken down. A year later, Princess Diana told Martin Bashir during her Panorama interview that there were three of them in her marriage that’s why it was too crowded.