Prince Louis, the youngest child of the Prince and Princess of Wales, is growing up quickly and celebrates his sixth birthday today (April 23).
Despite making his public debut just hours after his birth on the steps of the Lindo Wing, he's largely been raised away from the public eye.
He has, however, participated in several significant Royal events, including the late Queen's Platinum Jubilee celebrations, King Charles' Coronation, and last year's Trooping the Colour.
Yet, there's one major Royal milestone that six year old Louis hasn't achieved - a milestone his younger cousin, Prince Archie, who resides in America, has already reached.
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