Meghan Markle may have raised "gentle concerns" about whether Prince Harry's memoir was the "right move", according to sources.
The memoir Spare was released almost two weeks ago and includes claims that Prince William physically attacked him, and that King Charles put his own interests above his son's.
Harry makes allegations against his stepmother Queen Camilla and claims she "sacrificed me on her personal PR altar".
He also described his late mother, Diana, Princess of Wales, as his “guardian angel” and said she is with him “all the time”.
The memoir has proved controversial and has led some to question if Harry can ever repair his relationship with his royal relatives or if he will attend his father's coronation in May.
In an interview, he said he "would like nothing more" than for his children Archie and Lilibet to have relationships with the royal family.
But according to The Telegraph, Harry's wife Meghan is understood to have been more wary than him when it came to his memoir project.
A source tells the publication "media-savvy" Meghan may have voiced gentle concerns about if releasing the memoir was the right move.
However, once Harry decided to press ahead with the project, she is said to have offered him her full support.
The source said: "Is this the way she would have approached things? Possibly not. But she will always back him and would never have got involved in promoting such a personal project.
"This was about his own life, his journey and his own perspective."
After the book's release, Harry embarked on a promotional tour and gave a series of interviews for US TV and one in the UK.
Meghan did not appear in any of these chats despite Harry supporting his wife during several of her projects.
He made a cameo appearance in her 40th birthday video where she announced her 40x40 initiative and joined her at a school in New York when she promoted her children's book The Bench. He also joined her in their bombshell chat with Oprah Winfrey in 2021.
But a source added that if Meghan had become involved she would have been accused of "trying to steal the limelight".
It comes as Harry’s controversial memoir became the fastest-selling non-fiction book in the UK since records began in 1998.
According to Nielsen BookData, which collects and provides information on distribution and sales measurement of books, Harry’s headline-grabbing autobiography Spare sold 467,183 copies in its first week.
Both Buckingham and Kensington Palace have remained silent over Harry’s allegations.