The letter will be given to guests who attend the annual “Together at Christmas” carol service at Westminster Abbey on Dec. 6.

"Love is the light that can shine bright, even in our darkest times. We all have something we can offer one another," the beloved royal wrote.

Kate Middleton has released a new letter on Instagram as she opened up about 'difficult times' after the Princess of Wales was diagnosed with cancer earlier this year

Kate, Britain's Princess of Wales, says love is the greatest gift people can give each other in a message to guests who will attend her annual Christmas carol service next week at London's Westminster Abbey.

Kate, the Princess of Wales, has shared a Christmas letter offering a poignant message about the importance of “love, kindness and forgiveness.”

The Princess of Wales has sent an emotional Christmas message calling for "love, not fear" ahead of her carol concert next week. Catherine says the Christmas story is about "the importance of giving and receiving empathy" and showing "how much we need each other in spite of our differences".

The Princess of Wales has written a poignant letter to guests attending her fourth carol service amid her own cancer recovery