Prince Harry was reportedly summoned by Queen Elizabeth II after a furious row ahead of his wedding to Meghan Markle, a new book claims.
Organising the wedding of the Duke and Duchess of Sussex was "particularly stressful" with rows about scheduling, announcements, the gospel choir and the tiara, The Times' royal correspondent Valentine Low writes.
Meghan had been told that the Queen would lend her tiara - and an appointment was made for her to meet the late monarch's dresser Angela Kelly so she could look at appropriate tiaras for the big day.
The Duchess chose Queen Mary's diamond bandeau tiara and wanted to try it on the day her hairdresser Serge Normant was in town, the author says in her new book Courtiers: The Hidden Power Behind the Crown.
However, Ms Kelly was not available on that day and Meghan could not get access to the tiara.
Prince Harry reportedly thought the Queen's dresser was being "obstructive" and felt "furious" about it, Mr Low writes.
Another version of events claims that Meghan demanded access to the tiara without making an appointment with Ms Kelly and she was told she needed to follow protocol as these jewels are "kept under very tight lock and key".
Mr Low claims that Harry "put pressure on Kelly to bend the rules" and used "some fairly fruity language" when addressing her.
The Queen's dresser then reported the incident to the late monarch, who summoned her grandson to a private meeting.
A source claims Harry had been "downright rude" and was "firmly put in his place" by Her Majesty, according to the book.
Another book by royal expert Katie Nicholl claims that Queen Elizabeth II found the run-up to Harry and Meghan's wedding "very difficult".
The late monarch was also said to be "very upset" by how her grandson had treated her, it was further alleged.
The author's book The New Royals: Queen Elizabeth's Legacy and the Future of the Crown alleges that Harry told his grandmother's long-time dresser: "What Meghan wants, Meghan gets!"
Meanwhile, Mr Low's book also claims that Meghan complained that she was not being paid for walkabouts during a royal visit to Australia in 2018.
The Duke and Duchess of Sussex spent 16 days travelling around Australia, Fiji, Tonga and New Zealand on their first royal tour four years ago.
The couple was popular during the tour, with huge crowds turning out to see them as they visited the countries and attended an impressive 76 engagements.
The book claims Meghan "enjoyed the attention" she received but did not understand the point of royal walkabouts.
Quoting unnamed members of staff, the book claims that Meghan was heard saying: "I can't believe I'm not getting paid for this."
Courtiers: the Hidden Power Behind the Crown by Valentine Low will be published on October 6 by Headline Books (£20)