A body language expert has identified Kate Middleton as the most confident member of the British royal family, despite not being born into royalty or brought up in the spotlight.

Darren Stanton, speaking on behalf of Betfair Bingo, observed that the Duchess of Cambridge's body language reveals her newfound confidence among the royals. Stanton told the U.K.'s Woman and Home, "I believe Kate is now the most confident member of the royal family and is very much accepted by all the members of the royal family, especially Camilla, with whom she has a strong friendship, and Kate has a great deal of respect for her mother-in-law."

Stanton attributes the 42-year-old Princess of Wales' confidence to her "fantastic sense of humor," which sets her apart from other members of the royal family, including her husband Prince William, father-in-law King Charles III, and Queen Consort Camilla. He also noted that, like the late Princess Diana, royal enthusiasts are fascinated with Middleton's style, behavior, interviews, and sense of humor.

Stanton recalled that the princess was initially shy when she married Prince William and joined the royal family in 2011. "In the early years of Kate Middleton becoming a public figure, she was shy and reserved, and we often called her the girl next door. This is similar to Princess Diana's experience, as both proved to be quite shy, and it was clear they were not comfortable in front of the camera and sought more anonymity," Stanton explained.

However, the Princess of Wales has since developed resilience and confidence after exposure to media, interviews, and public scrutiny. Stanton observed that Middleton now demonstrates "new powerful, abundant and confident body language" and maintains "fantastic eye contact."

Stanton anticipates that King Charles' coronation on May 6 at Westminster Abbey in London will further showcase the princess's confidence. "I believe at the coronation, we will see even more of an abundant, confident and powerful version of Kate. I think Kate will perform admirably and continue to demonstrate what kind of monarch she will be with the eventual King William," the body language expert said.

Middleton is one of the most popular members of the royal family. In a recent poll by market research company Ipsos, she was chosen as the favorite royal by 38% of respondents.