Royal fans and watchers rarely see Kate Middleton and Queen Elizabeth together. But, when they do, the public could reportedly see a close bond between the two British royals.

Judi James recently told the Daily Express that the Queen and the Duchess's body languages during royal engagements have continued to provide everyone a "glimpse" into their relationship. She added that the duo's "languages" when together appear similar to what the British Monarch has when she is with her close companions.

The body language expert explained that this is the true "nature" of their relationship. After years of spending time together as working royals, the bond has grown between them.

James emphasized, though, that Kate Middleton and Queen Elizabeth have "different personalities." Nevertheless, she countered that this only means that there is very "little mirroring" between them.

The expert, then, described the Duchess of Cambridge as a "cheerful" and "fuss-free" person. She, also, noted that the future Queen Consort has since grown into a more confident and dependable working royal. As a result, the Queen now appears to be "more relaxed" and "upbeat," when her granddaughter-in-law is around.

In the end, Judi James pointed out that what makes it very interesting is that Queen Elizabeth uses a lot "eye contact" when chatting with Prince William's wife.

Kate Middleton officially became a senior working royal when she married Prince William in 2011. She has since attended and made appearances on several royal engagements.

Reports added that she has also become one of the most popular British royals. In YouGov's latest poll, she comes next to Queen Elizabeth on top of the list.

While the British Monarch has an overall 74 percent approval rating, her granddaughter-in-law has 65 percent, similar to her husband, the Duke of Cambridge. Several fans, also, deem her as a "good role model," adding that she is "genuine" and "admirable."

These days, many royal experts and commentators believe that Kate Middleton and Prince William have taken more royal duties. This became even more apparent when Meghan Markle and Prince Harry left the British Monarchy to start a new chapter of their lives outside the United Kingdom.

Despite the added responsibilities and busy schedule, the public has since commended her for her "unwavering commitment" to the British Monarchy. Many have, also, pointed out that she has already started preparing for her future role as the Queen Consort of the United Kingdom.