Princess Charlotte is set to be granted one of the "grandest" royal titles after it was reserved for her by King Charles - a new book claims.
The seven-year-old is currently third in line to the throne behind her father Prince William and older brother Prince George.
She's currently formally known as Princess Charlotte of Wales - a nod to her parents being the Prince and Princess of Wales.
But it's likely that as the youngster grows up and enters adulthood, her royal title will change.
And with George's future already mapped out as King, royal author Robert Jobson writes in his new book Our King Charles III: the Man and the Monarch that Charlotte is in line to become the future Duchess of Edinburgh.
He explains: "Sensitive to the fact that nine-year-old Prince George's future is already mapped out, Charles has been careful to reserve one of the grandest titles for Princess Charlotte – currently called Lottie by her mother and Mignonette (French for cute little thing) by her father."
"Although the King has made his brother Edward the new Duke of Edinburgh, the title is only for life. After Edward dies, Charles has made it clear Charlotte (now aged seven) should become Duchess of Edinburgh."
Last month, the King granted the title of Duke of Edinburgh to his youngest brother Prince Edward, making his wife Sophie the Duchess of Edinburgh.
The announcement from Buckingham Palace came on Edward's 59th birthday last month with his new title, previously held by his father the late Prince Philip, set to be with him for his lifetime.
It had long been known that Edward would one day become the Duke of Edinburgh after a pledge made by the late Queen on his wedding day in June 1999.
At the time, eyebrows were raised when he was given an Earldom rather than a Dukedom. However, it was announced at the time of the nuptials that Edward would succeed his father as the Duke of Edinburgh with the blessing of his parents after his death.
Philip's desire for Edward to have the title was in recognition of his son's decades-long commitment to the Duke of Edinburgh's Award, the youth scheme which is one of Philip's greatest legacies.
The dukedom – which in the past has been hereditary – will not, however, pass down to the Edinburghs' son James when Edward dies.
And explaining this in his book, Jobson writes: "Charles, determined to reduce the size of the Royal Family, wants such senior titles to be given only to its working members and stop it expanding further.
"The move by the King to focus on the line of succession is significant, as Charles III plans a modernised, slimmed-down monarchy."
