The Queen greeted Meghan Markle with open arms but worried Prince Harry was "a little over-in-love" with her, a new book claims.
Prince Philip's friend, Gyles Brandreth, claims the late Queen Elizabeth was fond of Meghan and did everything to make her feel welcome.
Writing in his upcoming book, Elizabeth: An Intimate Portrait, the author and broadcaster said the rest of the royal family also offered the American a warm welcome, contrary to what Meghan said in her Oprah interview.
An excerpt of the book was published on Mail Online.
In it he said the Queen was delighted at the prospect of Harry marrying Meghan but had one worry:
"The only concern the Queen let slip in the early days of the Sussexes’ marriage was to wonder to a friend if Harry wasn’t ‘perhaps a little over-in-love’", writes Brandreth.
"This was as far as she came – to my knowledge at least – to ever uttering a word against the new Duchess of Sussex."
The Queen had apparently even suggested Meghan keep working as an actress, as she was concerned about the duchess's future happiness.
In his biography, Brandreth also says the Queen reportedly died from bone marrow cancer.
Her Majesty's official cause of death was listed as "old age", but Brandreth wrote: "I had heard that the Queen had a form of myeloma — bone marrow cancer — which would explain her tiredness and weight loss and those ‘mobility issues’ we were often told about during the last year or so of her life.
The book also claims the Queen suffered periods of low energy, despite telling aides she was determined to stay busy after Prince Philip's death in April last year.
When Her Majesty felt weaker she filled her time by by watching BBC drama Line of Duty, the biographer claimed. She is reported to have said that her husband would not have approved.
It comes after reports one of the Queen’s final wishes before she passed away has been carried out by King Charles, as six new people are appointed to the UK's distinguished Order of Merit.
The late Queen Elizabeth chose the select six in early September, before she died, Buckingham Palace insisted.