King Charles has reportedly “had to accept limitations” while undergoing cancer treatment, as Prince William and Princess Kate “have been preparing for their future roles sooner than they would have expected,” according to a royal biographer.

At 76 years old, the King revealed his cancer diagnosis in February. Despite taking a three-month break, he has since returned to fulfill his duties as monarch with dedication.

Royal expert Sally Bedell Smith shared with People: “Although the King is carrying out his duties with typical determination, he has had to accept limitations during his cancer treatment.

“As a result, William has been taking on more responsibilities, and he and Kate have been preparing for their future roles sooner than they would have expected.”

A source from the palace shared: “There’s a sense of calm before the storm.

“They are next in line for the biggest job of their lives, and of course, Kate’s health has taken priority, but it’s also allowed everyone to take a step back and figure out what’s important right now.”

In March, Princess Catherine, 42, disclosed her diagnosis with an unspecified type of cancer and temporarily withdrew from her public responsibilities.

In a positive update regarding her health, Kate shared in an emotional video on social media in September that she had successfully completed her preventative chemotherapy.