• Simon Dorante-Day shared a new side-by-side photo comparison of his teenage son and a younger Prince Charles
  • Some social media users claimed that the resemblance between the two was "remarkable"
  • Dorante-Day claimed his adoptive grandmother had worked for the Queen and told him "outright" he was Camilla and Charles' child

A man in Australia who claims to be the secret son of Prince Charles and his wife Camilla, Duchess of Cornwall, has offered alleged new "photographic evidence" as part of his decades-long battle to prove his royal claims.

Simon Charles Dorante-Day, of Queensland, previously claimed in an interview with that his grandmother, who he said had worked for Queen Elizabeth II, told him "outright" that he was Camilla and Prince Charles’ son "many times."

On Sunday, Dorante-Day posted on Facebook a new side-by-side photo comparison of his teenage son, Liam, and the Prince of Wales, 73, showing the teen and a younger Charles sporting similar expressions.

In the caption, Dorante-Day said the picture of Prince Charles was from author Simon Regan's 1977 book, "Charles, the Clown Prince," and credited a person he identified only as Julie for the "very interesting comparison and composition."

One Facebook user claimed that Prince Charles and Dorante-Day's son had a "truly remarkable resemblance."

"Wow Simon, the resemblance is uncanny. That's unreal. The royal bloodline is definitely prominent. Can even see the same resemblance as Princess Anne in your pic," another commented on Dorante-Day's post.

"Your son looks so much like your father Prince Charles but also looks very like your grandmother the Queen," another Facebook user suggested.

In the comments section of his post, Dorante-Day also responded to a user who asked if he believes Prince Charles and Camilla know about him and his wish to contact them. "They know," he claimed.

Dorante-Day said he was born in the U.K. on April 5, 1966, and was adopted by a local couple named Karen and David Day when he was 8 months old, according to He claimed his adoptive grandparents, Winifred and Ernest Bowlden, had both worked for the Queen and Prince Philip in one of their royal households and that his grandmother told him many times that he was Camilla and Charles’ child.

Dorante-Day also claimed that his first name, Simon, and middle name, Charles, were given to him by his biological parents and that his adoptive mother told him that it was a condition of the adoption that his name stay the same.

This latest comparison is just one of several photos that Dorante-Day has released to show the alleged similarities between himself, his children and some members of the royal family.

He previously shared a photo of his daughter Meriam alongside Prince William's daughter Princess Charlotte, as well as an image comparing his son's features with that of the Queen.

"Photo comparisons and obvious physical resemblances are considered by the courts in paternity cases," Dorante-Day previously told "Obviously DNA testing is the main goal here and what I want to happen, but the photographic evidence is just another piece of the puzzle."

Dorante-Day claimed he believes that there is enough evidence for the court to compel a DNA test from Prince Charles and Duchess Camilla. He added that he wanted to "have a relationship" with not only the royal couple but also Prince William and Prince Harry, Prince Charles' sons with his first wife, Princess Diana.

However, Dorante-Day claimed that the main reason he was taking his case to court was that he believes he and his family are "owed" answers.

The royal family has never responded to Dorante-Day's allegations.

Prince William, Camilla, Prince Charles and Prince Harry
Prince Harry’s wild antics delayed Prince Charles and Camilla Parker Bowles’ wedding announcement. Pictured: Prince William, Camilla, Prince Charles and Prince Harry laugh during the Invictus Games Opening Ceremony on Sept. 10, 2014 in London. Getty Images/Chris Jackson