Prince Louis stole the heart of the nation last night as he joined a star-studded crowd to make his debut at the Princess of Wales‘ annual carol concert held at Westminster Abbey.

Fans went wild as an adorable clip showed the young royal’s eyes light up as actor Jim Broadbent, 74, read The Father Christmas Letters from J.R.R. Tolkien.

The five-year-old, said to have ‘Christmas magic in his eyes’, was seen nudging his mother Kate, whispering ‘mama’ and pointing at the award-winning star as he read to the audience.

Upon entering the concert, the youngest child of the Prince and Princess of Wales, posted letters to children less fortunate than himself alongside his older siblings, Princess Charlotte, 8, and Prince George 10.

The trio stood proudly next to their parents – as well as other senior royals – as they held candles and sung Christmas songs in the festive hall filled with 1,500 people.

Prince Louis was seen pointing and smiling as actor Jim Broadbent The Father Christmas Letters from J.R.R. Tolkien

At the beginning of the show, aired on ITV tonight, the young Prince was seen posting letters to the North Pole alongside his siblings

The Together At Christmas service – supported by the Royal Foundation – was this year held in honour of those who work to support babies, young children and families across the UK

Prince Louis stood alongside his mother and sister as he holds a candle during the Christmas concert

Prince Louis prepares to blow out his candle during the carol service

Prince George, Louis and Princess Charlotte post letters to Santa

The Together At Christmas service – supported by the Royal Foundation – was this year held in honour of those who work to support babies, young children and families across the UK.

Linked to Kate’s Shaping Us campaign, the service will showcase ‘the hope of new life and why it is so important to build supportive, nurturing worlds around children and the adults in their lives’.

While it was filmed on December 8, the full concert was aired to the public tonight on ITV.

Prince Louis had previously been too young to attend his mother’s annual Christmas concert but his debut did not disappoint.

One wrote on social media: ‘Look how excited Prince Louis was to see Jim Broadbent it was lovely.’

Prince William and Princess Kate arrive at Westminster Abbey with Price George, Princess Charlotte and Prince Louis

Kate smiles as Prince Louis clutches at her coat and places a reassuring hand on his back

Kate meets actor Jim Broadbent at her Together At Christmas carol concert on December 8

Prince Louis and Princess Charlotte exchange a glance during the concert

The Princess of Wales greets Freya Ridings, Adam Lambert, Beverley Knight and Jacob Collier Together At Christmas carol service

Princess Charlotte and Prince Louis accompany their mother to her Christmas carol concert

Prince William introduces Prince George to members of the Clergy at Westminster Abbey in London

Savannah Phillips, Peter Phillips, Isla Phillips and Zara Tindall arrive to attend the Christmas concert

The Duchess of Edinburgh smiles and waves as she arrives outside Westminster Abbey

Another said: ‘My favourite part of the entire service was Prince Louis adorable reactions throughout. He’s so cute.’

A third added: ‘He’s a gorgeous 5 year old with an enchanted smile for Christmas.’

At the end of Broadbent’s reading, Prince William and Prince George also exchanged a smile as festive cheer spread across the chapel.

During another adorable moment in the concert, captured on camera earlier this month, the youngster was seen cheekily blowing out his sister’s candle at the concert – leaving his siblings in stitches.

The mischievous royal blew out Charlotte’s candle as their mother Kate laughed. He was pictured puffing his cheeks in an attempt to extinguish his older sister’s candle, as she smiled.

Prince Louis waves as he walks hand in hand with Prince William

Prince Louis cheekily blew out his sister’s candle at Kate’s Christmas carol concert, which has left his royal siblings in stitches

Jingle Belle! Kate radiant in white as she arrives for carol concert

Prince George, Princess Charlotte and Prince Louis walk inside Westminster Abbey holding candles

Prince Louis was dressed in a chequered shirt with a smart navy coat and Chelsea boots

Princess Charlotte looked solemn before the beginning of the service

Prince William also took part in the service giving a reading from the Gospel of Luke

The Princess of Wales pictured with members of the clergy ahead of her carol service

The Wales’ were joined by other senior members of the royal family such as Sophie, Duchess of Edinburgh

During the visit, the Princess of Wales met with members of the Scouts

Princess Charlotte’s sweet smile as she shakes hands with clergy

The Wales children were on their best behaviour as they greeted members of the clergy at the Abbey’s Lady Chapel.

Prince Louis looked shy while his older brother and sister smiled, shook hands and said hello to the priest.

George looked the double of his father wearing a smart suit, while his younger brother wore a navy button-up jacket, narrow-legged trousers and blue suede Chelsea boots.

Charlotte meanwhile wore a £180 double-breasted burgundy wool coat from Trotters.

Opening the ceremony, the Princess of Wales, wearing a monochrome outfit, welcomed audiences watching from home on Christmas Eve to re-watch the service and spoke of the meaning of Christmas.

‘Christmas is a time when we come together and celebrate the birth of a newborn baby,’ she said.

‘The arrival of every baby is a precious and momentous time, it brings us together to reflect on new beginnings and brings hope for the future.

‘Throughout our earliest interactions, relationships and experiences, with those who love us, even before we are born, we lay the foundations to so much of what that future will depend on.

‘But only by valuing and supporting the vital role of the adults in a child’s world can we hope to make a difference.’

The Princess of Wales waves at the crowds as she arrives at Westminster Abbey

The Princess of Wales and Princess Charlotte (left) smile as Prince Louis (centre) looks on at the carol service recorded earlier this month

The Princess of Wales’ sister Pippa Matthews (left) and her husband James attend the service

Sweet moment Prince William shares a look with Prince George

Prince William also took part in the service giving a reading from the Gospel of Luke.

Sophie, Duchess of Edinburgh, was seen pictured alongside the family of five.

Princess Beatrice, her stepson Christopher Mapelli Mozzi and husband Edoardo Mapelli Mozzi, also made an appearance as well as Princess Eugenie, Zara Tindall and Peter Phillips and his daughters Savannah and Isla.

Although the King and Queen Camilla were not present at the event, donated Christmas trees from Windsor Great Park to decorate Westminster Abbey, which were donated to the local community after the service.

Among the group of celebrities who greeted the family were singers Beverley Knight, Adam Lambert and musician Jacob Collier.

Kate’s sister Pippa and husband James Matthews were seen at the event, as were Lady Sarah Chatto and her husband Daniel Chatto.

Midwives, nursery teachers and baby bank volunteers were amongst those 1,500 people invited to the festive event, which thanked those working to support children in their early years.