CHEEKY Prince Louis last night stole the show as he attended the Together at Christmas carol concert with his family.
The five-year-old watched with his siblings as the Princess of Wales hosted the special festive service at Westminister Abbey.
Louis, Princess Charlotte and Prince George beamed in their blue and maroon coats, as they held their parents' hands and headed into the festive event.
The well behaved kids were seen holding letters - which they then posted to less fortunate children in time for Christmas.
But after the service Louis showed his cheeky side as the trio held candles.
The young prince was seen playfully blowing out his big sisters candle as Princess Kate laughed.
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It's not the first time Louis pulled the spotlight.
Earlier this year during the trooping of the colour Louis put on a show for royal fans while on the balcony of Buckingham Palace.
He was seen pulling faces, covering his ears and stretching his arms as he stood on the balcony of Buckingham Palace during the RAF flypast.
While the service was filmed last night, it won't be broadcast until 7.45pm on Christmas Eve.
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A teaser clip for the Royal Carols: Together At Christmas programme featuring Kate aired on ITV1 on Thursday.
And on Friday Kate stunned in an all-white outfit, waving to crowds as she made her way inside.
Ahead of the service, Kate was seen chatting to Dame Sheila Hancock.
Meanwhile, Kate's sister Pippa Middleton and husband James Matthews also headed into the Abbey.
Other royals included Sophie Wessex the Duchess of Edinburgh, Princess Eugenie and Princess Beatrice.
Stars like Adam Lambert and Freya Ridings were also photographed making their way in to perform for the crowds.
The service, supported by The Royal Foundation, honours those who work to support babies, young children and families in communities 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".
The Westminster Abbey choir will perform popular carols, alongside musical performances by the likes of Jacob Collier, Freya Ridings and James Bay, and a special duet by Beverley Knight and Adam Lambert.
Readings will be given by speakers including the Prince of Wales, Micheal Ward, Emma Willis, Roman Kemp, and Jim Broadbent, while a specially commissioned poem written by Joseph Coelho, the Children's Laureate, will be read by Leonie Elliott.
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The Christmas Eve broadcast will also feature additional content, including an introduction by Kate and films emphasising the importance of early childhood.
It will include contributions from Rio and Kate Ferdinand, Ugo Monye, Andrea and Virginia Bocelli and Dame Sheila Hancock.