After meeting with aides and members of her Royal Foundation at Windsor Castle on Tuesday to discuss the event, Kate was noted in the Court Circular.
Since her cancer health crisis at the beginning of the year, she has only been named four times in the official record of royal activities.
For the fourth year in a row, the service will take place at Westminster Abbey and be televised on ITV on Christmas Eve.
The princess, together with her spouse, kids, and other royals, is anticipated to preside over the service.
Kate just shared a very intimate video with her family to announce the end of her chemotherapy treatment.
In a video that included her outside with Prince William and her kids, she stated that her main goal was “doing what I can to stay cancer free”.
The future queen’s participation in the Christmas carol service is a step closer to her resumed full schedule of engagements.
Since late February, the princess had been undergoing chemotherapy for an unidentified type of cancer.
The King was diagnosed with an enlarged prostate earlier that month, and he started receiving cancer treatment.
