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.

Meghan Markle's lifestyle series, "With Love, Meghan," is premiering March 4 on Netflix. The Prince and Princess of Wales are said to be focusing on the crown.

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.

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 is continuing Princess Diana's legacy through his work with Centrepoint, and the Prince of Wales visited the charity on Jan. 21 amid Kate Middleton's remission news.

Meghan Markle and Prince Harry have been hit with bombshell allegations from former employees ahead of the release of their new Netflix show, With Love, Meghan