SHOW DOWN BEFORE THE CORONATION

Her May 6 crowning has Queen Consort Camilla in full diva mode... especially when it comes to handling son-in-law Prince Harry!

There’s been a change of plans. A new report claims that after King Charles III’S coronation on May 6, his wife, Queen Consort Camilla, will be known simply as Queen Camilla. It’s quite an upgrade from her current title — which had been granted by Queen Elizabeth II ahead of her death at age 96 last year.

But the role of Her Majesty is one Camilla, 75, seems to be leaning into. In fact, Life & Style has learned that she’s been making a host of demands ahead of her and Charles’ official crowning — and it’s put Camilla at odds with her husband, 74. “She’s turned into coronationzilla!” dishes an insider. “Camilla and Charles are disagreeing about absolutely everything, from the direction of the ceremony to which celebrities should be invited. She’s even bossing Charles around over his outfit. There’s only so much he can take.”

HARRY SITUATION

One of their biggest points of contention is what to do about Prince Harry. In his memoir, Spare, Charles’ youngest son, 38, calls Camilla “dangerous” and reveals he begged his father not to marry the woman whom his late mother, Princess Diana, famously referred to as the third person in her marriage. In a 60 Minutes interview, Harry also alleged his stepmom forged a relationship with the press that allowed for good coverage of herself at the expense of negative stories about him. Given those accusations, it’s not all that surprising that Camilla doesn’t want Harry and wife Meghan Markle, 41, around on the royals’ big day this spring.

“Camilla feels that the pair don’t even deserve

the privilege of attending the coronation after Harry slammed her,” spills the insider.

Though a rep for Harry and Meghan recently confirmed that the king is evicting the family gossips from their last bolt-hole in England, Frogmore Cottage, “Charles believes they should be present during such a milestone moment,” adds the insider. “He hasn’t completely forgiven Harry and Meghan, but is trying to make some kind of progress. Camilla is attempting to get in the way of that happening.”

The showdown over the Sussexes as well as other coronation details have taken a toll. “Camilla and Charles go through periods of sleeping in separate bedrooms because of the arguing and her constant complaining,” says the insider. “He’s hoping she’ll calm down and see the bigger picture before the invites go out. But so far, Camilla has been a total nightmare.”

“Camilla is pulling every string to ensure she shines during the coronation,” says an insider. “When something doesn’t go her way, she’ll throw childish tantrums.”

Charles is at his wit’s end over Camilla’s “diva demands,” says the insider. Still, he knows “Camilla is the power behind the throne and has guided him to the position he’s in today.”