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.

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.

According to the Mail on Sunday, Kate celebrated the new year by taking a skiing vacation in the Alps. Kate was joined on the trip, which reportedly happens "just over two weeks ago," by her husband, Prince William, and their three children, Prince George, 11, Princess Charlotte, 9, and Prince Louis, 6.

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

Through what's been a challenging year for the royal family, Prince William and Princess Kate's relationship has taken center stage, and according to royal sources, they've only come out of 2024 stronger.

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.