The Princess of Wales says she is in the early stages of treatment after a cancer diagnosis.
In a video statement, Catherine says it was a “huge shock” after an “incredibly tough couple of months”.
But she sent a positive message, saying: “I am well and getting stronger every day.”
Details of the cancer have not been disclosed, but Kensington Palace says it is confident the princess will make a full recovery.
The video statement from Catherine explains that when she had abdominal surgery in January, it was not known that there was any cancer.
“However tests after the operation found cancer had been present. My medical team therefore advised that I should undergo a course of preventative chemotherapy and I am now in the early stages of that treatment,” said the princess.
The chemotherapy treatment began in late February. The palace says it will not be sharing any further private medical information, including the type of cancer.
The princess, 42, said she was thinking of all those who have been affected by cancer, adding: “For everyone facing this disease, in whatever form, please do not lose faith or hope. You are not alone.”