LONDON — Kate, the Princess of Wales, held her first official engagement Tuesday since announcing last week that she had completed her cancer treatment.

Kate, wife of Prince William, the heir to the British throne, attended a private meeting at Windsor Castle, according to the Royal Circular, a daily briefing of royal activities published in the Times of London newspaper.

An entry from Tuesday reads: “The Princess of Wales, Joint Patron, The Royal Foundation of The Prince and Princess of Wales, this afternoon held an Early Years meeting at Windsor Castle.”

No pictures or details of the meeting were released by the palace. The Royal Foundation is the main philanthropic vehicle for William and Kate, supporting community groups that work on early years education, homelessness and conservation projects.

Kate said in a deeply personal video message last Monday: “Although I have finished chemotherapy, my path to healing and full recovery is long and I must continue to take each day as it comes.”

The princess has appeared in public since she revealed she was undergoing cancer treatment in March, including at the men’s final at Wimbledon in July. She sat in the Royal Box with her daughter, Charlotte, and sister, Pippa Middleton Matthews.

In June, she attended Trooping the Colour, an annual military parade to celebrate the birthday of the monarch. It emerged in February that King Charles III, her father-in-law, himself was receiving cancer treatment.

Their absence has led to a distinct shortage of senior royals available to carry out official daily duties since the death of Queen Elizabeth II, the departure of Prince Harry and Meghan to California and, Prince Andrew stepping down from front-line duties.