Prince George and Prince Louis burst out laughing in sweet moment for royal brothers

Several members of the Royal Family and celebrities turned up in support of the Princess of Wales.

One such celebrity was actor Richard E. Grant, who read a passage from A Christmas Carol, the 1843 novel by Charles Dickens.

During Grant's segment, the camera turned to the Wales family, who were sitting in the front row at Westminster Abbey.

Both Prince George, 11, and Prince Louis, six, burst out laughing at Grant's endearing performance.

Princess Charlotte, nine, also featured prominently in the TV broadcast of the carol service, as she was seen stepping in to help her younger brother with his candle.

The big sister was seen assisting Louis in lighting his candle with hers, demonstrating their supportive relationship during the festive evening.

Both children were impeccably dressed for the occasion, with Louis wearing a dark blue suit with a festive red tie, whilst Charlotte donned a red coat dress matching her mother's outfit, complete with navy tights and a red bow in her hair.

The service featured performances by notable artists including Paloma Faith, Olivia Dean, and Gregory Porter.

Meanwhile, Prince William delivered a Bible reading.

Throughout the service, Prince Louis displayed endearing moments of closeness with his mother, the Princess of Wales.

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The six-year-old was observed shuffling closer to Kate while his older siblings remained in their seats, showing his desire to stay near his mother during the public event.

The Princess of Wales remained attentive to her youngest child throughout the evening, ensuring his comfort in the formal setting.

Kate was seen constantly smiling down at Louis and placing a loving hand on his back as they departed the cathedral.