THIS is the adorable moment Prince Louis's eyes lit up at the mention of Santa after he joined his mum Kate for the Royal carol service.
Playful Louis was on his best behaviour for the service, which aired yesterday evening.
Fans of the Firm couldn't help but notice how his eyes lit up when actor Jim Broadbent read The Father Christmas Letters by J.R.R. Tolkien.
Louis was said to have "Christmas magic in his eyes" as he nudged Kate and whispered "mama" as the note was read out.
He was captured sensibly holding a candle throughout the service, including 1,500 people.
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The Princess of Wales led her Christmas Eve special at Westminster Abbey - attending alongside her family and famous faces from the music world.
The festive get-together included performances from stars like Beverley Knight, Freya Ridings, and James Bay.
This year the service focused on the vital importance of early childhood.
It was also a time to thank those supporting the very youngest members of our society during those crucial early years, as part of the Shaping Us campaign.
By Kate's side were Prince William, who gave a bible reading, and their three children George, ten, Charlotte, eight and five-year-old Louis.
Stealing the hearts of the nation as always, the cute young royal sang Joy to the World with his siblings.
The theme of Kate's annual telly spectacular was 'children and families' coming after the princess launched her Shaping Us project to help the under 5s this year.
And in a touching behind the scenes video shown on ITV, Kate, dressed in a festive red and white jumper to meet 13-year-old Rico and Russell Gray, his coach in Manchester.
Sources say the friendship has helped Rico by building his confidence and allowing him to pursue his passion in football.
Smiling Kate, 41, emerged on screen for a tea party shaking the youngster's hand and saying: "Hi Rico, so nice to meet you.
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She asked: "Seeing and building this relationship with Mr Gray, has it helped you with your own relationship with your friends?"
Rico, in a green jumper emblazoned with a football wearing a Santa hat, replied: "It's brought trust because if you can trust one person then you can trust more people."
Russell Gray told Kate: "If you can reach them self-reliance, responsibility, increase their self-esteem, which football and teamwork does all of that, then you've done a good job.
"You should try and give something back and especially children because that's where it all starts."
The Together At Christmas service is supported by the Royal Foundation.
