Her Royal Highness has organised her annual festive musical service at the iconic London venue, with attendees featuring dignitaries, stars, and everyday helpers who have helped their communities.
The large audience will enjoy a selection of traditional hymns, orchestral pieces, and literary excerpts from stars like Chiwetel Ejiofor and Kate Winslet.
The focus of the service, held in the glowing Westminster Abbey on Friday afternoon, is compassion and demonstrating care for others.
Attending the event are a couple named the Cordiners, whose daughter died of a brain cancer, and who founded an organisation, a charity called Kayleigh's Wee Stars, to aid parents with a child with a terminal illness.
"The dedication, empathy, and kindness you show, often quietly and unspoken, and without any expectation or recognition, make an profound impact to the lives of others," Her Royal Highness stated in a message before the concert.
The Princess of Wales is continuing her own steady comeback to the public eye subsequent to her illness and medical care, in November making her first public speech for two years, in which she talked about recognising the "discreet, frequently unseen labour of caregivers".
Attendees entering the Abbey can listen to talented youth performers supported by the Future Talent charity, co-founded by the Duchess of Kent to broaden opportunities for musical tuition.
An 18-year-old named Carys Wood, who performs on the trumpet and is from southwest Wales, has been supported by the charity, with grants helping towards equipment, teaching, and travel fees - and she said it was "amazing" to be taking part in the concert.
"Music can be very expensive," Carys said. She is now enrolled at the Royal Academy of Music, and added that "each individual ought to be given the possibility" to hone their artistic talents.
Carys's 11-year-old sister, Eliza, who is a euphonium player, will be present at the Abbey. "It's unbelievable that I get to perform here in front of so many notable figures," she said.
Attending the service will be representatives of different generations.
That will feature Saphia Turner, aged nine, recipient of a young hero award, who creates and sells art and completes fundraising tasks to generate funds for local food charities.
The Abbey has been festooned with specially made wreaths, with well-known chef Mary Berry and flower expert Simon Lycett helping to make them.
The musical lineup includes recording artist Katie Melua, the Westminster Abbey choristers and a nautical singing ensemble, Fisherman's Friends, who said the invitation to sing was "the icing on the cake for us."
The festive event titled 'Together at Christmas' will be broadcast on a major network on Christmas Eve.
A seasoned business strategist with over a decade of experience in scaling startups and advising entrepreneurs across Europe.