Carole Middleton Sticks Close to Princess Kate During Daughter's 'Frightening' Cancer Battle

Carole Middleton has been by Kate, Princess of Wales,' side "the entire time" as Her Royal Highness battles cancer.

"Her mom has been staying with her to help her recuperate," a source revealed.

The Princess of Wales announced she was battling cancer with chemotherapy in a video message released on Friday, March 22. The future queen did not reveal the type of cancer she has.

"I wanted to take this opportunity to say thank you, personally, for all the wonderful messages of support and for your understanding whilst I have been recovering from surgery," the princess shared. "It has been an incredibly tough couple of months for our entire family, but I’ve had a fantastic medical team who have taken great care of me, for which I am so grateful."

At the end of the message, the future queen movingly reminded "all those suffering with this disease" to "never lose hope" and reminded them that "they are not alone."

King Charles III, who is also receiving treatment for an unknown cancer, shared that he is "so proud of Catherine for her courage in speaking as she did."

Another family source also revealed: "The day the family found out was the day William canceled going to the memorial of his godfather, King Constantine of Greece," they added. "They have been processing the information and Kate has already started chemotherapy."

The disease is said to be "in its earliest stages," which is also where Kate's treatment currently is. "My medical team therefore advised that I should undergo a course of preventative chemotherapy, and I’m now in the early stages of that treatment," HRH explained. "This, of course, came as a huge shock, and William and I have been doing everything we can to process and manage this privately for the sake of our young family."

"As you can imagine, this has taken time," the queen-in-waiting continued. "It has taken me time to recover from major surgery in order to start my treatment. But, most importantly, it has taken us time to explain everything to George, Charlotte and Louis in a way that is appropriate for them, and to reassure them that I am going to be ok."

"As I have said to them; I am well and getting stronger every day by focusing on the things that will help me heal; in my mind, body and spirits," the senior royal added. "Having William by my side is a great source of comfort and reassurance too. As is the love, support and kindness that has been shown by so many of you. It means so much to us both."

Us Weekly reported on Carole's support.