Catherine, Princess of Wales, has been diagnosed with cancer and has begun chemotherapy, she announced in a video message on Friday, in which she described the past two months as “incredibly tough for our entire family.”

It comes after a period of intense uncertainty about the health of Catherine, who underwent abdominal surgery in January and largely disappeared from public view as she tried to recuperate.

Like the king, Catherine, 42, did not specify what kind of cancer she has, but asked the public and news media to respect her desire for privacy.