Prince Harry was left fuming after a senior royal dubbed Meghan his “showgirl”.
Another royal said “she comes with a lot of baggage”.
And Harry was further angered by brother William referring to Meg as “this girl”.
The revelations, in new book Finding Freedom, came as royal biographer Andrew Morton said Princess Diana would have been “devastated” by the rift between her beloved sons.
According to the revelations – on Sky TV ahead of publication in the Sunday Times – sources revealed William had given advice to Harry about his relationship with Meghan.
William reportedly said: “Don’t feel you need to rush this. Take as much time as you need to get to know this girl.”
Harry, 35, was said to have felt the comments came with a “tone of snobbishness” that was “anathema to his approach to the world”.
The book says Meghan was a topic of Palace gossip when she first dated Harry in 2016.
One extract says: “One senior royal referred to the American actress as ‘Harry’s showgirl’.
Another told an aide, ‘She comes with a lot of baggage’. And a high-ranking courtier was overheard telling a colleague, ‘There’s just something about her I don’t trust’.”
The book also refers to Meghan’s relationship with William’s wife Kate. It says there were some “awkward moments” but the pair never had a falling out.
It says: “Meghan would agree the duchesses were not the best of friends. Their relationship hadn’t progressed much since she was Harry’s girlfriend. But they were not at war.”
The book’s co-authors, Carolyn Durand and Omid Scobie, claim Harry was offended by William’s advice, but according to the pair, William was happy for his brother, but “just wanted to make sure that Harry wasn’t blindsided by lust”.
Harry’s belief that the palace was out to sabotage his relationship was the beginning of the rift with his brother.
He is said to have felt “unprotected” by the institutions around the monarchy, and derided by the old guard for being “too sensitive and outspoken”.
The Duchess of Cambridge apparently did little to bridge the divide and never really got to know Meghan.
One source said of Harry: “He’s extremely protective of Meghan. He understands that a lot of people are against them, and he will do everything he can to keep her safe and away from getting hurt – even if that means distancing himself from those people.”
Another said the coolness between the princes was the reason for Harry and Meghan’s move to Windsor.
“He wanted to get away from the goldfish bowl that was Kensington Palace,” the said.
“Everywhere you turn, you’re surrounded by staff and family. He was at a point in his life where he was working with his brother, doing the foundation with his brother and living by his brother.
“It was too much.”
Other claims include that
– The two couples hardly spoke at the Commonwealth service at Westminster Abbey in March, despite not having seen each other since January.
– The Sussexes felt their complaints were not taken seriously and believed other royal households were leaking stories about them to the press.
– Being told to operate under Buckingham Palace’s umbrella after splitting their household from the Cambridges was “a big disappointment” to the Sussexes.
– The Sussexes even considered breaking protocol by springing a surprise visit on the Queen when they believed they were being blocked from seeing the monarch.
A spokesman for Harry and Meghan said the couple did not contribute to the book, but he did not deny the content of The Times’s extracts.
The spokesman told the PA news agency: “The Duke and Duchess of Sussex were not interviewed and did not contribute to Finding Freedom.
“This book is based on the authors’ own experiences as members of the royal press corps and their own independent reporting.”