Meghan Markle is warned about her inappropriate attitude towards the monarchy.

Royal biographer Anna Pasternak blasted Markle for breaking the royal code. The author of “Untitled: The Real Wallis Simpson” predicted that if the Duchess of Sussex continues to insist on doing things her own way, it would only cause difficulties for the royal family.

While speaking on Yahoo’s "Royal Box," Pasternak said that Markle hasn’t realized that she cannot live like an A-List Hollywood star while she’s with the royals because the monarchy “demands a very different set of behavior.“

The royal expert went on to say that Markle seemed to bring her own style, which she didn’t think was “appropriate.” Pasternak added that it won’t work after a while.

She also reminded Prince Harry’s wife that she cannot be an international star because there is always Queen Elizabeth, Prince Charles, Prince William and Kate Middleton before her to ensure the continuity of the monarchy.

“I think she's heading for a very tricky situation because I think, actually, very little has changed in the last 80 years in terms of the power of the courtiers,” Pasternak said. “What I’ve discovered through my research on Wallis Simpson and Princess Diana is that the one goal of the monarchy, the ultimate goal is survival and for that the spotlight has to be on the monarch or the heir apparent.”

On the other hand, Pasternak praised the Duchess of Cambridge and Duchess of Cornwall. She admitted that she’s not fond of Camilla Parker Bowles because she’s team Diana but recognized Prince Charles’ second wife’s impressive behavior with the royals.

“Both the Duchess of Cambridge and the Duchess of Cornwall have adhered to the Royal code which is to keep quiet, not to bleat through friends to the press, not to press their case in the press and to get on with where they are in the royal family,” she explained.

In related news, Prince Harry and Markle reportedly asked Queen Elizabeth II to give them total freedom following their split from Prince William and Middleton. However, the monarch vetoed their request because she believed that they should work together.

The Duke and Duchess of Sussex will soon welcome their first baby. Markle is due in a few weeks and the newest member of the Firm may arrive in April or May.

Kate Middleton, Camilla Parker Bowles and Meghan Markle
Pictured: Camilla Parker Bowles, Prince William, Kate Middleton, Prince Harry and Meghan Markle attend a ceremony to present a new Queen's Colour to the Royal Air Force (RAF) at Buckingham Palace in London on July 10, 2018 to mark its centenary. Getty Images/Tolga Akmen