Kate Middleton, the Princess of Wales, is spreading a message of “love, kindness and forgiveness” ahead of her annual Christmas carol service at Westminster Abbey Dec. 6.

Princess Kate urged the letter's recipients to consider “the importance of love, empathy and how much we need one another.”

Catherine, Princess of Wales, penned a touching letter for guests ahead of the annual "Together at Christmas" carol service, which will be held on Dec. 6 Westminster Abbey.

Christmas may be a time for celebration, but this year, for Kate Middleton, it's also a moment to reflect. On Saturday, the Princess of Wales penned a poignant holiday message to the 1,600 guests of her annual "Together at Christmas" carol concert following a difficult year that saw her undergo chemotherapy treatment after a devastating cancer diagnosis .

A post appeared on the Instagram profile of Kate Middleton and Prince William regarding this year's Christmas carol concert. The Duchess sent a special letter to guests in which she writes about "the most difficult times.

Kate Middleton expressed the importance of spreading love and kindness as she reflected on her challenging year in a heartfelt letter to guests attending her annual Christmas carol concert next week.