An Australian man who claims he's Prince Charles and Camilla's long-lost son says Princess Diana was on the verge of exposing the secret.

Simon Dorante-Day, 52, says he was born when the heir to the throne and his now wife were teenagers, but was put up for adoption.

And he alleges Princess Diana knew about him and nearly revealed his existence before her death in 1997.

In an interview with Australian magazine New Idea, he said: "We believe that Diana knew of my existence and that she had put the pieces together.


Clarence House has declined to comment on Mr Dorante-Day's outlandish claims.

Simon Dorante-Day says he was born in 1966 to a teenage Charles and Camilla
He believes Diana had learnt of his existence and was on the verge of exposing the 'secret'

Mr Dorante-Day was born in Gosport, Hampshire, in 1966 when Charles and Camilla would have been in their late teens - several years before they are believed to have first met at a polo match in 1970.

He was adopted by his grandma Winifred, an employee of the Queen and Prince Philip.

Mr Dorante-Day claims his grandma told him "many times" that he was "Charles and Camilla's child".


Mr Dorante-Day would have had to have been conceived in 1965, when Charles was 17 years old and Camilla aged 18.

The Australian believes he has Camilla's hair and the Queen's jaw line
The outlandish claims would mean Charles and Camilla had met some five years before their official first introduction in 1970

He continued: "Someone had commented on my facial bone structure being the same as Her Maj. The Camilla-style hair doesn’t miss."

Simon, who calls himself 'Prince Simon' on social media, would now like a DNA test to "end his 40 year search".

He often shares updates on his Facebook page.

One of friends recently wrote: "You very much look like Camilla's brother. I wish you all the best with your case."

Another posted: "Simon there is no doubt you are of royal blood. Why can't they just come out and admit it."