The 75-year-old monarch and his daughter-in-law have "always been close" Their recent health issues have seen them grow even closer to one another. Charles was being treated for an enlarged prostate when his cancer was detected.

Catherine revealed in a video message on Friday (03.22.24) she was undergoing preventative chemotherapy after cancer was diagnosed following her surgery. Both she and the king, as well as their spouses, wanted to speak openly after supporting cancer charities, patients and affected families.