King Charles On The Verge Of Having Meltdown, William 'Very Angry' Over 'Harry & Meghan' Trailer: Royal Expert

Prince Harry's father and brother were reportedly not pleased with the trailers for his upcoming documentary on Netflix, according to a royal expert.

American journalist and author Christopher Andersen weighed in on how Prince Harry and Meghan Markle's Netflix documentary trailers affected the royal family. According to him, Prince Harry's family found the first trailer "horrible." The second promo premiered Monday where the Duke of Sussex seemingly dropped bombshells about the members of the firm, with Andersen telling Us Weekly, "The sense of betrayal has shifted over to genuine combat mode because, obviously, this is a war between the two," referring to the Sussexes and the royal family.

He noted that the new monarch "has been handed this horrible problem," which the Queen allegedly "would've tried to just ignore as long as she possibly could." However, he warned the Sussexes that, unlike Her Majesty, King Charles is "not that kind of person."

"Charles has a huge temper, has been unleashed many times behind the scenes," the author of "The King: The Life of Charles III" added. "And I'm sure he's on the verge of having a meltdown."

He also talked about the Prince of Wales' possible reaction to the trailers. The first promo dropped Thursday, a day before his and Kate Middleton's green carpet event in Boston, prompting some to speculate the Sussexes were trying to steal the Waleses' thunder. Prince William and Middleton were in the U.S. for a three-day trip that culminated in the second Earthshot Prize ceremony on Dec. 2.

Andersen said the Duke of Cambridge "also has [a] temper" but is more of a "slow burner" compared to their father. However, the author believed that the heir to the throne was also livid.

"I mean, he tries to hide it, but it doesn't work," Andersen explained. "I'm sure he is very, very angry at his brother and cannot understand what he's doing."

Andersen added that the Prince and Princess of wales' U.S. visit was "overshadowed" by the royal drama and the racism issue against Lady Susan Hussey.

"William and Kate [are] all about preserving the monarchy and duty and all of that. And the release of these trailers, at the moment ... [the Cambridges] were trying to fly the [British] flag as it were in the U.S. — and to have them eclipsed and overshadowed by that, and the Susan Hussey incident ... I'm sure they were stunned and shocked, even if they didn't show it," Andersen said.

International Business Times could not independently verify the claims.

While the Cambridges wanted to preserve the monarchy, according to Andersen, Prince Harry's biographer, Angela Levin, claimed the Sussuxes were all out to destroy the institution.

"Meghan and Harry are all out to destroy the monarchy and everybody in it," Levin told The Sun. "Perhaps with the aim of becoming King and Queen themselves - it's never going to happen, it's a fairy tale."

The first part of "Harry & Meghan" premieres Thursday on Netflix, and the second part will follow next week.