Princess Charlotte, 5, the second child of Prince William and Kate Middleton, is apparently more confident than her brothers, Prince George, 7, and Prince Louis, 2, according to a body language expert.

Judi James told The Sun that the fourth in line to the British throne has demonstrated that she's not camera-shy in a leaked photo of the Duke and Duchess of Cambridge's 2020 Christmas card.

The photo was unofficially shared on an Instagram fan account ahead of Kensington Palace's release. It shows William and Kate looking quite casual as they sat on haystacks in front of some firewood logs with their children.

Charlotte is sitting on her mother's knees, while Kate is clasping her daughter by her stomach. William has Louis on his lap, and the youngest Cambridge child has a huge smile on his face. On the other hand, George is sitting comfortably next to his father with a sweet and polite smile.

James explained that the family's pose demonstrates their tight bond but the expert fixated on Charlotte's appearance. She went on to explain that Charlotte's face evokes intelligence and curiosity, appearing more confident than her brothers. According to the expert, the young princess has a similar expression as her great-grandmother, Queen Elizabeth.

But while Charlotte looks confident, George apparently has a "tendency to shyness," and Louis is the current scene-stealer in the family. The expert said that the toddler's body language is all about "total joy."

Sources said that George, the third in line to the throne, is growing up to be the reserved kid in school. Despite his shyness, however, the Cambridge royal is apparently popular and has amazing leadership qualities as a budding athlete.

On Friday, Prince George, Princess Charlotte, and Prince Louis joined their parents for their first red carpet event at the London Palladium to watch a special pantomime performance. While Prince William gave a speech, it was his children who were clearly the stars of the night.

As they sat on the royal box to watch the show, official photographers took photos of the Cambridge family to share on the Kensington Royal Instagram.

The family also made their way backstage to talk to the performers. At one point, Prince William told the cast that he would need to have a sit down with his eldest son because he was asking about one of the character's risqué jokes during the performance. The Duke of Cambridge said that it might take him awhile to explain this to George.