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.

A palace source tells People that the couple is "more open" now following Kate's battle with cancer, adding that the Prince and Princess of Wales "talk about their relationship together" and are showing a different side to their traditionally private partnership.

Princess Kate and Prince William have shown unprecedented openness about their relationship following Catherine's cancer journey, according to sources close to the royal household. A source told People magazine that the Prince and Princess of Wales are "more open" now and "talk about their relationship together.

Prince William and Princess Kate will be facing a big change near Kensington Palace in Autumn this year – and it may impact their three children Prince George, Princess Charlotte and Prince Louis

It was a royal treat. On January 10, Prince Harry and Meghan Markle made an unannounced visit to the Pasadena Convention Center, where displaced Californians were sheltering from devastating wildfires.

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

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

The Prince and Princess of Wales have led tributes to celebrate the Duchess of Edinburgh’s milestone 60th birthday. Sophie, who joined the royal family more than 25 years ago upon her marriage to Prince Edward, marked the occasion privately on Monday at home with her husband, the Duke of Edinburgh.

Kate Middleton did a surprise visit at the Royal Marsden Hospital, which she is a patron of now and a royal commentator compared her recent actions to Princess Diana