The Princess of Wales is hosting her yearly Christmas carol concert at the iconic London venue, with a congregation comprising dignitaries, stars, and everyday helpers who have supported their local areas.
The sizable congregation will enjoy a blend of carols, music and readings from actors such as Kate Winslet and Chiwetel Ejiofor.
The theme of the event, held in the atmospheric historic church on Friday afternoon, is compassion and demonstrating care for others.
In the audience are Jonathan and Anna Cordiner, whose daughter died of a brain tumour, and who founded an organisation, a charity called Kayleigh's Wee Stars, to help households where there is a child with a terminal illness.
"The time, care and compassion you give, often quietly and unspoken, and without any thought of thanks or praise, make an remarkable change to the lives of others," wrote Catherine in a message before the festive gathering.
The princess has been making her own measured re-emergence to public life after her cancer diagnosis and chemotherapy, in November making her major oration since 2023, in which she discussed recognising the "selfless, commonly overlooked efforts of carers".
Those coming to the Abbey will be entertained by budding artists aided by the charitable trust Future Talent, set up with the help of the Duchess of Kent to broaden opportunities for musical tuition.
Trumpeter Carys Wood, 18, who performs on the trumpet and is from southwest Wales, has been assisted by the charity, with awards contributing to instruments, tuition, and transportation expenses - and she said it was "incredible" to be performing at tonight's service.
"Musical pursuits are frequently pricey," the musician remarked. She is now enrolled at the renowned conservatoire, and added that "each individual ought to be given the possibility" to hone their artistic talents.
Carys's 11-year-old sister, Eliza, who plays the euphonium, will be present at the Abbey. "I never thought I'd be able to play there in front of so many important people," she said.
Attending the service will be people from various age groups.
That will feature young Saphia Turner, nine, winner of a youth community award, who sells artwork and carries out sponsored challenges to collect donations for local food charities.
The Abbey has been decorated with handcrafted festive wreaths, with TV cook Mary Berry and florist Simon Lycett helping to make them.
Among the musical performers will be recording artist Katie Melua, the Abbey's own choir and a Cornish sea shanty group, Fisherman's Friends, who said the opportunity to perform was "a dream come true."
The Together at Christmas carol concert will be televised and shown on a major network on Christmas Eve.
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