Princess Kate Middleton, who is undergoing her own cancer recovery, has been an inspiration to King Charles III during his battle with the disease.

“Not a day goes by that Kate doesn’t check in on Charles with some type of gesture, whether it’s just a few words of comfort, a care package, or a supportive call if she’s too busy to see him in person,” an unnamed source told In Touch Weekly.

After the Princess of Wales revealed on September 9 that she had completed her chemotherapy treatment, her fortunes began to turn for the better. The news broke in March that Princess Kate was undergoing chemotherapy after being diagnosed with an unidentified disease; she plans to take a break from public life to concentrate on her health.

King Charles, King of England, revealed his cancer diagnosis one month before Princess was born.

An anonymous insider claimed that the royals would “talk for hours, and the king confides in Kate more than most, which is just heartwarming and beautiful for everyone to see.

Prince William, who is married to Kate, and Queen Camilla, who is married to King Charles, have all been there for the royal couple as they have weathered their own health crises.

The undisclosed informant revealed that Princess Kate and King Charles are “really are each other’s rocks.” One tipster also revealed that Kate has been working closely with Camilla and His Majesty's chief of staff to provide him with both emotional and practical support as he undergoes his own recuperation.

People also take note of Princess Kate's generosity toward King Charles.

“It speaks volumes as far as Kate’s compassion and sheer dedication to family that she’s still thinking of others above herself. For the king, this is proof she’s the most magnificent queen-in-waiting the monarchy could possibly wish for,” the mole stated.

Now that her chemotherapy has finished, Princess Kate is able to return to her job. There was a meeting at Windsor Castle when she discussed her early years childhood initiative with members of the Centre of Early Childhood team and the Kensington Palace personnel, as reported by the Royal Circular.

Princess Kate told the public earlier this month, "As the summer comes to an end, I cannot tell you what a relief it is to have finally completed my chemotherapy treatment." in reference to her health.

In light of her health issue, Princess Kate went on to say that the past several months had been "tough" for her, William, and their three children, Prince George, Princess Charlotte, and Prince Louis.

“Life as you know it can change in an instant and we have had to find a way to navigate the stormy waters and road unknown. The cancer journey is complex, scary, and unpredictable for everyone, especially those closest to you,” Princess Kate stated.

“With humility, it also brings you face to face with your own vulnerabilities in a way you have never considered before, and with that, a new perspective on everything. This time has above all reminded William and me to reflect and be grateful for the simple yet important things in life, which so many of us often take for granted. Of simply loving and being loved,” the Princess of Wales went on.