Princess Charlotte behaved in an unbelievably mature manner for an eight-year-old during the men's singles final at Wimbledon this month, and according to the Daily Express, there is a reason for that confidence, which her mother, the Princess of Wales, has intentionally cultivated.

Charlotte is known as a mirror of her mother Kate, and body language experts explained that Charlotte takes her moment in the spotlight "at her own pace" just as Kate does. Body language expert Judy James said that Kate sometimes takes credit for her only daughter's confidence when in the spotlight, mimicking the assertiveness that Kate herself has developed over the years.

"Charlotte was seen cheering, smiling, and clapping during the match [at Wimbledon], and seemed happy and confident as Kate, the royal patron of the All England Lawn Tennis and Croquet Club, took her to greet the staff." The magazine wrote. James attributed Charlotte's calmness to Prince William and Kate's willingness to raise her (and her brothers, Prince George and Prince Louis) as "normally" as possible.

"She [Charlotte] has benefited from Kate and William's determination to mimic Kate's childhood and give them all as normal, rounded, and secure a childhood as possible," James said.

"Part of Kate's natural confidence stems from her happy childhood and perhaps the wide range of life experiences she gained during her early years living in Jordan."

Kate was only two years old when the Middleton family relocated to the Middle Eastern country. This was because Kate's father, Michael, was relocating with his employer, British Airways. The family lived in Jordan until September 1986, or about two years, when they returned to the Berkshires.

And Kate is mentoring her only daughter for the future that lies ahead, James says. The Daily Express reports that "Kate has been seen patting Charlotte's face, talking to her between plays, and putting her hand on the chair." She also made introductions to the staff, explaining everything that was happening to Charlotte, and Kate's "encouraging approach" gave her daughter a full royal introduction, suggesting that she wanted to "inspire her daughter to be as enthusiastic about the game as she is."

Of their trip to Wimbledon, James said, "I got a glimpse of how she is actively mentoring her daughter for royal life." Their mother-daughter relationship is maturing into a lovely friendship, similar to the relationship between William and his son George. And it was lovely to see Charlotte and Kate act more like fans than royalty during the match, especially Charlotte's support for (Carlos) Alcaraz and his victory. The bond between Kate and Charlotte is also visible in the natural and often subliminal mirroring of similar poses and use of similar gestures"

For example, Charlotte employs a "cut-off ritual" - placing both hands over her face - which James describes as a "direct imitation of her mother."

Charlotte not only inherited Kate's confidence, James says, but also her "competitive spirit" and "tendency to lead." (Marie Claire calls such moments "Charlotte taking the lead.")

"She [Charlotte] now has the freedom to act spontaneously in public and celebrate Alcaraz's victory by throwing her arms up in the air and appearing to 'roar,'" James said. 'Kate is totally in tune with her daughter. Their synchronicity means that she knows when to back off and when to encourage Charlotte's growth in freedom and independence."