Dressed in blue, sporting a mischievous mug, little Prince Louis attended Christmas mass at St. Mary Magdalene Church in Sandringham, Norfolk, with the entire British royal family.

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Smiling, the 4-year-old child walked alongside his grandfather, the new King Charles III, Queen Consort Camilla, his parents William and Kate as well as his brother George and his sister Charlotte.

The royal family took the opportunity to greet the crowd.