When it comes to performing royal duties, Kate Middleton has quite a zeal for it. The Duchess of Cambridge is often a part of social public activities that are held in the benefit of children and adults. Soon after the summer is over and Cambridges' returned from Balmoral, Queen Elizabeth II's summer holiday mansion, Middleton is back to her duties.

The latest report suggests that the royal might be preparing herself for her future role as the Queen of England. In its cover story, People has revealed what several sources close to the couple have observed in Kate Middleton. According to the insiders, there is something about her that has changed, and it is her confidence. Her increasing confidence makes her comfortable around people.

"She is finding her voice," a royal source revealed. Middleton is often seen working for the wellness of children and women. Being a mother-of-three is one of the biggest motivators for her to work towards raising awareness about early childhood issues.

The duchess has interacted with a panel of experts, who have only praises for her. They revealed that she shines through the meetings no matter how long they are. As a part of these events, Prince William's wife is eager, intense and enthusiastic about understanding the issues.

"The Duchess wouldn't just join us, she would stay for the whole meeting," said Kate Stanley, director of the strategy at the National Society for the Prevention of Cruelty to Children.

Previously, the 37-year-old royal had a reputation of being shy. However, she is reportedly "more open" and "relaxed" at public meetings. "You see it more and more. The young student has turned into our future Queen," the magazine quoted. Her improved confidence and pleasing manners are a clear statement of her future self as a queen.

Kate Middleton and Queen of Bhutan
The Duchess of Cambridge with the Queen of Bhutan during a visit two years ago. Getty/Chris Jackson

Middleton has been married to Prince William for eight years. The Duke of Cambridge is the elder son of Prince Charles, the heir to the British throne and second in the line of succession. With three kids, Prince George, Princess Charlotte and Prince Louis, Middleton is performing her roles -- as a mother and that of a member of the British Royal Family, and setting the foundation for her future role of the queen.