The blonde-haired prince was christened at the Chapel Royal in St James's Palace on October 23, 2013 in a small ceremony attended by close family members of the couple.
Britain's Kensington Palace released on social media Sunday family photos from the recent christening of Prince Louis, the third child of Prince William and his wife Kate.
Kensington Palace shared the photo - taken by Matt Porteous - on its official Twitter page.
At the baptism the family of the Duke and Duchess of Cambridge for the first time appeared in full force - with three children.
From the duchess's side, Kate's parents, Michael and Carole; brother, James; pregnant sister, Pippa, and her husband, James Matthews, were there. It's a replica of the gown Queen Victoria had commissioned for her oldest daughter, Victoria, in 1841, which was worn by royal babies until 2008.
Official images from the Christening of Prince Louis. Source Matt Holyoak
And in the last and most touching image, proud mother Duchess Catherine cradles her son in the gardens of Clarence House - their unbreakable bond on full display as the 36-year-old looks down at her son with pure glee and elation.
One picture shows the Duchess of Cambridge, Kate, holding a giggling Prince Louis. Standing, left to right: Camilla, The Duchess of Cornwall; Prince Charles, the Prince of Wales; Prince Harry, the Duke of Sussex; and wife Megan, the Duchess of Sussex.
Louis was sound asleep as he was carried into the Chapel Royal by Kate for the christening ceremony which lasted 40 minutes.
Queen Elizabeth II and Prince Philip are notably absent from the group photos as they were unable to attend their new great-grandson's christening.
Louis enters the full name of Prince William is William Arthur Phillip Louis - and George - George Alexander Louis.
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