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

When Kate Middleton celebrated her 43rd birthday on January 9, her husband Prince William wrote a tender message and shared it on the couple’s public Instagram account. According to royal expert Ingrid Seward of Majesty magazine, the display of affection was a sign that the couple has grown closer following Kate's cancer diagnosis in early 2024.

Kate Middleton and Prince William met while studying at St Andrews University and returned to the institution in 2005 for their joint graduation ceremony

Kate Middleton, known worldwide as the Princess of Wales, endured arguably the most turbulent year of her life in 2024. Amidst growing concern over her health and well-being, Kate

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 famously met and fell in love during their time at St Andrews University. And on the day of their joint graduation, the Vice Chancellor made a prophetic comment

A source close to the royal family commented on the pair's marriage following Middleton's latest health update.

Kate Middleton has said it's a 'relief' to now be in remission following her cancer diagnosis, with one source suggesting the Princess of Wales had been struggling

Kate Middleton announced her cancer diagnosis. Kate Middleton did not specify the type of cancer that she was diagnosed with and stayed away from the public eye for a significant period of time. In 2025,