Charles’ affirmation that his wife WILL be queen confirms her as “non-negotiable” in his modern monarchy

King Charles has sent a message to his wife’s detractors – including Prince Harry – that she is firmly at the top of the pecking order after confirming her new title as Queen Camilla, royal experts said today.

Officials revealed the news last night when they shared an image of the coronation invitation that will be sent out later this month, which read: “The Coronation of Their Majesties King Charles III and Queen Camilla.”

Royal commentators said the title, which will take place after the ceremony on May 6, marked the “end of a remarkable journey” for Camilla, who was once portrayed as the most hated woman in Britain in the wake of the princess’s death. Diana in 1997.

It comes after the 38-year-old Duke of Sussex branded his stepmother “dangerous” and “bad guy” during a publicity blitz for his bombshell memoir Spare earlier this year, accusing her of “exchanging information” with the press in exchange for positive reporting about herself.

Royal author Phil Dampier told MailOnline: “It certainly sends a message to Harry and everyone else that Camilla is firmly at the top of the pecking order.”

He added: ‘The late Queen Elizabeth made it clear that she wanted Camilla to be queen and that made things a lot easier for Charles.

“After only a few months, we drop the consort and just call her queen, as it should be, as every previous queen was known by that title.

So far Camilla hasn’t put a foot wrong, but now she’s facing a grueling string of overseas tours and major public events at an age when most of us are putting our feet up. It will be quite a test, but hopefully she can handle the task.’

Meanwhile, Kings expert Richard Fitzwilliams told MailOnline today that Camilla’s new title “marks the end of a remarkable journey.”

He said: ‘Since she married Charles, the then Prince of Wales, in 2005, she has worked tirelessly to support him and carry out her duties in an exemplary manner.

She never defended herself or attacked her critics.

The ferocity with which she was once taunted and her way of dealing with what must have been a devastating period after Diana’s tragic death are vivid memories for those who followed royal affairs at the time.

“There was also a worldwide fascination with what had gone so wrong in Charles’s marriage.”

He added: ‘Camilla was ‘non-negotiable’ for Charles and the photo released by the Palace of them in Buckingham Palace’s Blue Drawing Room shows how happy they are together.

The King must have been outraged by Harry’s recent attack on her in an interview promoting his memoir Spare, saying she was ‘dangerous’, citing ‘the need to restore her image’ as rode.

“However, it is the Sussexes whose image may need to be repaired because of their arrogance – as polls now show.”

Asked about the title – when the accompanying press release itself still referred to Camilla as the Queen Consort – a senior royal aide told the Mail: “It made sense to refer to Her Majesty as The Queen Consort in the early months of His Majesty’s government, to be distinguished from Her Majesty Queen Elizabeth II.

“Queen Camilla is the proper title to knock off King Charles at the invitation. The coronation is an appropriate time to officially inaugurate ‘Queen Camilla’. All former Queen Consorts are known as Queen plus their first name.’

It is understood that Buckingham Palace will update its website next month to reflect the change.

The Daily Mail was the first to reveal in December that the Palace planned to remove the word Consort from Camilla’s title ‘organic’ this year.

This was confirmed by The Mail on Sunday in February, when it reported that she would be named queen after the coronation.

The change, once unimaginable, seals a remarkable transformation for Camilla in the nation’s affections.

When she married the then Prince of Wales in 2005 in a civil ceremony — which Queen Elizabeth declined to attend — it was announced that Camilla was “intending” to be known as Princess Consort when her husband ascended the throne.

The use of the word “intended” was intended to give royal aides room for maneuver, but at the time many still blamed her for the failure of Charles’s marriage to Diana, Princess of Wales.

Since then, however, Camilla, 75, has won over many with her warmth, sense of humour, lack of complaining and work for the victims of domestic violence, as well as the promotion of literacy.

A royal insider said last night: ‘His Majesty has always seen it as a matter of honour. He is king, so it follows that his wife must be queen.

“It’s like telling someone not to be known as Mrs. So-and-so.

“It is entirely up to them whether they choose to be called that, but it is still fundamentally their right to do so.”

Tomorrow marks a month before the coronation, but invitations to the historic event, the first of its kind in 70 years, will only be sent out about two weeks in advance.

They become collector’s items, with a beautifully designed border of flora and fauna galloping around a Green Man, an ancient traditional symbol of spring and rebirth, to represent the new reign.

Buckingham Palace has also confirmed the Pages of Honor of the King and Queen Consort – led by Charles’ grandson Prince George, who will take part in the two-hour ceremony at the age of nine.

The then-Princess Elizabeth was 11 when she watched her own father be crowned in 1937, but she had no official role. Her son, Prince Charles, who was only four, also failed to attend her own coronation in 1953.

Prince George will not only be watching, but has been asked to wear his 74-year-old grandfather’s robes along with three other pages, Lord Oliver Cholmondeley, 13, Master Nicholas Barclay, 13, and Master Ralph Tollemache, 12.

The Queen Consort’s honorary pages are Her Majesty’s grandsons, Master Gus and Master Louis Lopes, both 13, and Master Freddy Parker Bowles, 13. The fourth is Camilla’s second cousin, Master Arthur Elliot, 10.

The new portrait of Their Majesties released last night was created last month in Buckingham Palace’s Blue Drawing Room by Hugo Burnand, who will also be taking their official coronation photos.

Camilla wears a favorite Fiona Clare dress with a pearl necklace with diamond clasp and pearl earrings.