Prince William and Kate Middleton are reportedly a good support for King Charles and Queen Camilla.

There seems to be no competition between the British monarch and heir apparent. Royal experts weighed in on the Prince and Princess of Wales' relationship with King Charles and Queen Camilla, and one said the younger royal couple is an "incredible enhancement" to the reigning monarch and his wife. 

"They are pursuing the initiatives that are important to them. They are not pushing to supplant the King and Camilla -- they are an incredible enhancement," royal biographer Sally Bedell Smith told People.

Bedell's words seemingly echoed body language expert Judi James' observation of the four senior royals when they all attended the Royal Albert Hall in London for the Festival of Remembrance. The "Bodytalk: The Skills of Positive" author said the Waleses were careful not to steal the King and Queen's thunder.

"With her hands folded in front of her torso, the message seems to be that the couple intend to avoid upstaging the King and Queen at this event with this slightly more self-effacing body language," James explained. 

The Duchess of Cambridge also received praise for supporting her husband and being tough despite the controversies plaguing her. A few weeks ago, Middleton and King Charles were dragged into a royal race row when Prince Harry and Meghan Markle's alleged "mouthpiece," Omid Scobie, dropped his book "Endgame." The Dutch version of the book allegedly named Prince William's father and his wife as the racist royals.

"She has this public image of being nice and smiley and, dare I say, innocuous," royal author Valentine Low told the outlet of Middleton. "But she is actually strong-minded, strong-willed and prepared to fight for what she wants and what she thinks is right."  

Low, a British journalist and author of "Courtiers," acknowledged how Middleton "showed real strength and determination" in clearing that there was probably a "different truth" amid the royal race row.

"Kate thinks strategically," Low said. "She is going to be queen one day and has the long-term interests of the monarchy and royal family at heart." 

Several royal experts were also convinced that Middleton embodied the toughness needed to be a member of the firm. She was plagued by various issues before and after she married the heir to the throne, but she never lost her poise and composure. Middleton always remained calm and never spoke to the press, unlike her sister-in-law, Meghan Markle. 

Richard Kay, Editor-at-Large at Daily Mail, said the Duchess of Sussex should have learned a thing or two from Middleton.

"Well, don't forget, Meghan, her background was sort of engaging. I mean, she was used to being on a public stage, not a massive public stage, but she was, and she is a confident public speaker, and I think she probably thought she could handle this [royal scandal], and then she found that she couldn't," Kay said in one episode of the "Palace Confidential" podcast. 

"She should have taken a lesson out of Catherine's book, and things might have been different." 

Tags: Prince William Kate Middleton King Charles Queen Camilla