The monarch and his consort are expected to be accompanied by other members of the Firm.
Last year, Sophie, Countess of Wessex, Zara Tindall and Princess Beatrice were among the royals turning up at the abbey for the service.
Kate’s close family – her parents Carole and Michael Middleton and siblings Pippa and James – were also in attendance.
The royal presence will be particularly poignant at the upcoming service as it will show support for the Princess and her initiative.
Kate and Prince William will be joined on December 15 by King Charles and Queen Camilla
Harry & Meghan will debut on December 8
Meghan Markle and Prince Harry settled their household in the Tuscany-inspired Chateau of Riven Rock after staying at the home of actor and director Tyler Perry following their decision to quit their royal roles. Their attempts to fit in have also won the Duke and Duchess of Sussex a new nickname in the Montecito Journal.
It will provide a show of royal unity and strength on the same day Volume II of Netflix’s Harry & Meghan docu-series is to be released.
The two trailers for the six-episode show released so far by the entertainment giant hint the Duke and Duchess of Sussex are ready to make revelations and allegations against the Royal Family.
The latest teaser, released on Monday, includes Prince Harry speaking about the “hierarchy” existing in the Royal Family, adding: “You know, there’s leaking but there’s also planting of stories.”
Kate launched the Together at Christmas initiative last year to celebrate extraordinary members of their communities and charity leaders as well as bring people together after the coronavirus pandemic split apart families and friends for months.
Kate spearheaded the special carol service last year too
Kate and Prince William were joined by other members of the Firm at last year’s service
However, it will also be dedicated to Queen Elizabeth II and the values she upheld throughout her whole life.
In an operational note released ahead of the service, Kensington Palace said: “This year’s carol service is dedicated to Her Majesty Queen Elizabeth II and the values Her Majesty demonstrated throughout her life, including duty, empathy, faith, service, kindness, compassion and support for others.
“These principles are shared and personified by the inspirational guests who have been invited to the Abbey in recognition of their tireless work to help and care for those around them.”
Kate and Prince William posed for this picture alongside Camilla and Charles in September
Alongside the main service at the London abbey, a number of community carol services will be held across the UK throughout December, hosted by local Lieutenants and supported by the Royal Foundation.
While this event, spearheaded by the Princess and supported by William and Kate’s Royal Foundation, will take place next Thursday, it will be aired on Christmas Eve by ITV in a programme titled “Royal Carols: Together at Christmas”.
The broadcast will feature additional content, including an introduction from Kate, clips highlighting the deeds of some of the individuals celebrated during the service and tributes to the late sovereign.
Source: EXPRESS CO UK