Prince Harry reportedly has a heated temper especially while he was still working as a senior royal for The Firm.

In the book William at 40: The Making of a Modern Monarch, royal author Robert Jobson discusses the relationship between the siblings, as well as their differences.

He said Prince Harry used to swear at his colleagues, and he also shouted often due to the extreme mood swings that he inherited from Princess Diana.

And even though Prince William appears calmer in public, Jobson suggested that he also had a temperament that only Kate Middleton can handle. In fact, even Prince Charles struggled every time his sons would have outbursts because he had no idea what he was supposed to do.

“Charles admits he often finds it difficult to gauge either of his sons’ occasionally unpredictable moods. In that aspect of their nature, both princes are very much like their mother. They both have quite extreme mood swings, just as Diana did. She could be your best friend one minute and the next your worst enemy,” Jobson wrote (via Daily Star).

And on one occasion, the Duke of Sussex’s outburst was directed at Queen Elizabeth’s confidante and longtime friend, Angela Kelly. During one of their heated encounters, Prince Harry reportedly told Kelly that what his wife wants his wife gets.

This statement didn’t just surprise Kelly but it also shocked the queen because the monarch didn’t expect that Prince Harry would lash out at one of her closest staff members.

The queen also wanted Prince Harry to remember that Kelly was doing everything that she can to make his wedding a memorable one.

Last year, a palace insider detailed what really happened that led Prince Harry to scream at Kelly. The source said that everyone in Prince Harry’s circle wanted to do right by Markle because they know that this is what will make her husband happy.

However, when Markle’s demands and requests started to become outrageous, the insiders couldn’t help but deny some of them.

While it is understandable that royal weddings can be stressful, especially for the couple that will tie the knot, palace aides felt that Markle was out of place.

In her interview with Oprah Winfrey, the Duchess of Sussex revealed that there were more controversies that happened while she was preparing for her wedding.