Kate Middleton and Prince William are "more open" and "talk about their relationship together" amid her cancer journey, a source tells PEOPLE.

Kate Middleton, who is celebrating her 43rd birthday on Jan. 9, has proven herself to be the shiniest jewel of the British monarchy. The princess is married to Prince William, heir to the throne.

Prince William and Princess Kate seemingly broke a big royal rule to honour Duchess Sophie, seemingly sending a clear message to King Charles about the future of the monarchy.For the unversed,

Kate Middleton can now give British business her seal of approval, literally. The Princess of Wales, Kate Middleton is known to be a favorite amongst all royals and enjoys the approval of the general public the most.

"For much of the same reason, Camilla has not felt compelled to speak with Kate about what it's like to be queen."

William first visited the charity with his mother three decades ago. Prince William made a royal appearance today with a visit to the U.K. charity, Centrepoint. The visit marked a continuation of the charitable work done by his late mother,

The royal visited Centrepoint, a charity that helps homeless youth get back on their feet and of which his mother was a patron

On Jan. 21, the Prince of Wales, 42, kicked off the workweek with a visit to Centrepoint's Ealing hub in London to meet young people being supported by the charity.