In her message Kate will say: "Christmas is a time when we come together and celebrate the birth of a newborn baby.

Kate to introduce her carol service by thanking those helping babies and young children 'feel safe, valued and loved'

There had been previous hopes of rekindling the relationship between Harry and the Royal Family.

Prince Harry to spend Christmas away from 'Charles or William' after Endgame drama as others given first time invite

The Royal family have released their Christmas cards for 2023

William and Kate release family photo for annual Christmas card as Charles and Camilla opt for coronation snap

Louis cheekily put out Charlotte's candle

Prince Louis cheekily puts out Princess Charlotte's candle and delights Kate at Westminster Abbey carol service

Kate was joined by William, George, Charlotte and Louis.

Kate joined by Prince William and the children at her annual Christmas carol service in Westminster Abbey

This is the heartwarming moment the Prince of Wales surprised a mum raising money in tribute to her late daughter.

Touching moment Prince William surprises woman on charity walk in tribute to daughter, 16, who took her own life

The King and Queen were joined by William and Kate for the Diplomatic Reception.

Business as usual: Royal family puts on united front at diplomatic reception in first joint appearance amid race row

Kate Middleton visited Evelina London this morning

Business as usual: Kate brushes aside royal race row as she opens life-changing unit at children's hospital

King Charles (l) flies back from Cop 28 for crunch talks about Harry and Meghan (top r) following the row over the Dutch translation of Omid Scobie's book (bottom r)

Charles takes charge: King flies back from Cop 28 for crunch talks with William about Harry and Meghan

William and Charles are set to meet next week over the royal racism row

Plan to strip Harry and Meghan of titles, as William 'demands action' over racism row, with royals mulling legal action

Meghan has insisted she didn't leak the names of the royals at the centre of the race scandal to Omid Scobie

Meghan insists she didn't leak names of royals at centre of race row to Endgame author Omid Scobie

William and Kate dazzled on the red carpet as they brushed off Scobie's claims

William and Kate all smiles on red carpet as royals brush aside storm around Omid Scobie's book Endgame

The Prince and Princess of Wales were all smiles as they welcomed the Crown Prince and Princess of Sweden at Windsor Castle today

Kate and William are all smiles as they welcome Swedish Royals amid ongoing Omid Scobie race row

It is reported that William fell for her instantly when he saw Kate on the catwalk.

The Crown recreates 'knockout' moment Kate caught William's eye whilst modelling see-through knitted dress

Sadly 2023 looks like it will end as it began with Royals at war over a book and any reconciliation light years away

Sadly 2023 looks like it will end as it began with Royals at war over a book and any reconciliation light years away

The new book has claimed that Kate was 'cold' towards Meghan during her 'cries for help'.

Kate was ‘cold’ towards Meghan during ‘cries for help’ and jokingly ‘shivers’ at mention of Duchess’ name, book claims

Omid Scobie's new book contains a raft of claims about the royals

Archie's skin colour questions and King blasts Harry as a fool: The eight most explosive claims from new book Endgame

Sources close to the Sussexes say the couple are 'categorically unaffiliated' with Scoobie's book

Two royals who commented on Archie's skin colour named in letters between Meghan and Charles, Omid Scobie claims