His Royal Highness Prince Louis Arthur Charles of Cambridge was born on April 23, 2018 in the Lindo Wing of St Mary's Hospital, Paddington, London.
He is the third child of the Duke and Duchess of Cambridge - Prince William and Kate Middleton - and younger brother of Prince George and Princess Charlotte.
Louis is fourth in line to the throne and was christened on July 9, 2018.
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Kate MiddletonPrince William, Duke of CambridgePrince George Princess Charlotte of CambridgeRoyal Family
UPDATED 06:00, 10 Jan 2026