Prince William calls for 'togetherness' as royals unite for Kate's Christmas carol concert following docuseries

Prince William has called for "togetherness" as the royals put on a united front hours after the final episodes of the Duke and Duchess of Sussex's docuseries aired.

Speaking during Catherine, the Princess of Wales' second annual Christmas carol concert on Thursday, the Prince of Wales quoted the Queen's 2012 Christmas speech.

"At Christmas, I am always struck by how the spirit of togetherness lies also at the heart of the Christmas story," he told the audience at Westminster Abbey.

READ MORE: 10 biggest moments from Harry and Meghan's docuseries

William was joined by his wife Kate, their children, and several other royal family members including King Charles III at the service after Prince Harry made various accusations against his brother and father in the final episodes of Harry & Meghan.

The Duke of Sussex accused both of leaking sensitive information, and claimed he was terrified "to have my brother scream and shout at me and my father say things that weren't true" during the family meeting about the terms of his royal exit with Meghan.

In the face of these serious allegations, both the monarch and heir-to-the-throne epitomised the "keep calm and carry on" attitude the late Queen Elizabeth became famous for.

Firstly, both Buckingham Palace and Kensington Palace declined to comment on the claims raised in the six-part series.

Instead, King Charles forged ahead with official business during the day, holding audiences with ambassadors from Italy and Kazakhstan.

READ MORE: Prince Harry recalls 'cold' reception from royal family at final engagement

His Majesty was later joined by Camilla, Queen Consort, for a visit to London's Community Kitchen facilities in northwest London, where they met with volunteers and staff.

Then, in the afternoon, the father and son accompanied their wives to Westminster Abbey where Catherine, the Princess of Wales hosted her second annual Christmas carol concert.

Together At Christmas and was recorded on Thursday at Westminster Abbey, with the show airing in the UK on Christmas Eve – a day before the King's first Christmas address to the nation.

The royal family put on a united front at the event, which will pay tribute to the late Queen Elizabeth, as the Sussex drama swirled around them.

The Princess of Wales was the first to arrive for the event, making a solo entrance in a maroon-coloured coat dress with gloves and clutch both in hand.

Kate had her signature bouncy blow dry tucked behind one year to showcase long drop earrings, which appeared to feature ruby and diamonds.

A short time later the Princess popped back outside to greet Prince George, nine, and Princess Charlotte, seven, who arrived with their father, the Prince of Wales.

Charlotte was dressed to match her mum, while young George donned a suit for the outing, like his dad.

While the Queen Consort arrived alongside King Charles, in an outfit change after their earlier royal engagement.

Camilla donned a long white coat adorned with a festive ruby brooch, over a printed dress.

Sophie, Countess of Wessex was among the first to arrive for the occasion and dressed warmly for the sub-zero temperatures in a knitted dress, longline white coat and tan leather high heel boots.

Princess Beatrice and husband Edoardo Mapelli-Mozzi joined in the festivities again for a second year, along with Princess Eugenie and her husband Jack Brooksbanks, with both couples arriving holding hands.

Zara and Mike Tindall were also spotted walking hand-in-hand as they arrived inside Westminster Abbey, having recently returned from a visit to Australia.

Zara sported a very similar coloured ensemble to Kate, as did the Princess of Wales's sister Pippa Matthews, who arrived with mum and dad - Carole and Michael Middleton.

Extended members of the royal family were also spotted arriving for the carols service, including: Lord Frederick Windsor and his actress wife Sophie Winkleman, his sister Lady Gabriella Kingston as well as Prince and Princess Michael of Kent.

Also in attendance are approximately 1800 members of the public, who have been hand-picked for their services to the community and many come from Her Majesty's charities and patronages.

The TV special will feature an introduction by Kate and will be narrated by Catherine Zeta-Jones.

Other celebrities taking part in readings include Dame Kristin Scott Thomas and Paddington actor Hugh Bonneville, who recently joined the Queen Consort on a royal engagement.

Celebrity performers include Craig David, Spice Girl Mel C, Les Misérables star Samantha Barks, as well as musicians Alexis French and Alfie Boe.

The carol O Come, All Ye Faithful was picked to be the final performance of the night after 25,000 votes were cast in a public poll earlier this month.

It remains to be seen whether the Princess of Wales gets behind the piano again this year to perform for the congregation.

Nine Entertainment Co (the publisher of this website) owns and operates the streaming service Stan.