The Duke of Sussex reportedly has "no intention" of attending Prince Charles's coronation if the Duchess of Cornwall becomes Queen Consort.
Harry "refuses to bend" when it comes to his stepmother and will not be there if she's crowned at Westminster Abbey, where his mum's funeral took place.
He is said to be unwilling to back down despite the Queen giving Camilla her blessing to take power when the Prince of Wales becomes King , reports the Express.
A report in Private Eye said: "One red line has recently emerged, however.
"Harry has no intention of attending his father's coronation if Camilla is to be anointed and crowned just a few feet from where his mother's coffin lay in Westminster Abbey.
"[The Queen] may have given her blessing to Camilla becoming Queen Consort, but Harry refuses to bend."
The Queen backed Charles' wife publicly with her Platinum Jubilee message to the nation.
In a written message to the nation, the monarch said: "I would like to express my thanks to you all for your support.
"I remain eternally grateful for, and humbled by, the loyalty and affection that you continue to give me.
"And when, in the fullness of time, my son Charles becomes King, I know you will give him and his wife Camilla the same support that you have given me; and it is my sincere wish that, when that time comes, Camilla will be known as Queen Consort as she continues her own loyal service."
Clarence House had previously said Camilla would be Princess Consort but Prince Charles said he and his wife were "deeply conscious" of the honour the Queen had bestowed on them.
The change to the future roles was announced when the couple got married in 2005 following controversy over the breakdown of Charles's marriage to Princess Diana.
Charles's website was revamped in 2018 and any mention of "Princess Consort" was removed.
The news comes as Harry is believed to have met Charles during a surprise visit to the UK with Meghan Markle earlier this month.
They were on their way to the Invictus Games in the Netherlands and stopped off at Windsor Castle to see the Queen before heading to The Hague.
During an interview with NBC News at the Invictus Games, Harry dodged a question on whether he missed his father and brother Prince William.
He has commented previously about his rift with Charles and how he and his brother, William, are on "different paths" with good and bad days in their relationship.
Asked if he missed his father or brother, Harry replied: "For me at the moment I'm here focused on these guys and giving everything I can 120% to them to make sure they have the experience of a lifetime.
"That's my focus here and when I leave here, I go back and my focus is my family, who I miss massively."
The Duke's representatives have been contacted for comment.
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