Prince Louis of Cambridge's most adorable moments

<p><a href="/tags/0/prince-louis/">Prince Louis</a> of Cambridge came into the world on St. George's Day, his <a href="/tags/0/kate-middleton/">mom Kate</a>'s reported due date, and the little brother to <a href="/tags/0/prince-george">Prince George</a> and <a href="/tags/0/princess-charlotte">Princess Charlotte</a> was cute as a button - despite being the <a href="/tags/0/prince-william/">Duke</a> and Duchess's largest baby to date at 8 lbs 7 oz!</p> <p>The little one's full name, Louis Arthur Charles, is steeped in significance. Louis pays tribute to his great-grandfather Prince Philip's great-uncle, Earl Mountbatten, who was killed in 1979 by the IRA. The name, which is of French and German origin and means ‘renowned warrior,’ is one of William and Prince George’s middle names.</p> <p>Click through to see all of the sweetest photos of Prince William and Kate's third child...</p> <p>Photo: &copy; Getty Images
On Dec. 14, the Cambridge family released a perfectly casual photo for their Christmas card! Prince Louis totally stole the show in this one, showing off his adorable little grin for the camera. <p>Photo: &copy; Matt Porteous
To commemorate Prince Charles' milestone 70th birthday, the Duchess of Cornwall, the Cambridges and the Sussexes all gathered at Clarence House to pose for casual portraits together. And we just can't get over how cute baby Prince Louis looks, having a grab at grandpa Charles's nose! <p>Photo: © Chris Jackson / Clarence House via Getty Images
Prince Louis is clearly taking after his siblings' electric personalities! The newborn smiled gleefully in the arms of his mom, Kate, in a special fifth christening portrait released by the palace. <p>Photo: &copy; PA/Matt Porteous/The Duke and Duchess of Cambridge via Getty Images
The Cambridges posed for their first-ever portraits as a family of five on the day Prince Louis was christened. Prince George and Princess Charlotte grin happily, while Kate gazes down at her baby boy and Prince William shows off his megawatt smile. <p>Photo: &copy; Matt Holyoak/Camera Press
The newborn royal's christening portraits were absolutely stunning. His mom, Duchess Kate, looked down lovingly on her third child as he looked around the gardens and held onto his mom's chest. <p>Photo: &copy; Matt Holyoak/Camera Press
In one of the first glimpses of baby Prince Louis on his christening day, Duchess Kate held her new baby boy while walking into St. James's Palace in London. <p>Photo: &copy; DOMINIC LIPINSKI/AFP/Getty Images
Prince Louis looked serene as he slept in his mother's arms as the Cambridges arrived for his baptism. Fans delighted in seeing how much the little one had grown since his first official portraits were released at the beginning of May 2018. <p>Photo: © DOMINIC LIPINSKI/AFP/Getty Images
Even though conversation was going on around him between mom Kate and the Archbishop of Canterbury, Justin Welby, who performed his christening, Prince Louis dozed in his mother's arms. <p>Photo: © DOMINIC LIPINSKI/AFP/Getty Images
Kate revealed little details about 11-week-old Louis' personality at his christening, saying that he's "very relaxed and peaceful" before adding with a smile: "I hope he stays like this!" Photo: © DOMINIC LIPINSKI/AFP/Getty Images
In the first photo of the royal siblings, Princess Charlotte planted a kiss on newborn Prince Louis' forehead. The two photos shared on May 6, just a few weeks after William and Kate welcomed their third child, celebrated his birth and Charlotte's third birthday. <p>Photo: &copy; Getty Images
Louis looked absolutely adorable in his first portraits as a newborn baby. <p>Photo: &copy; Getty Images
Hi little angel! Prince Louis's white hat was from Spain, where his nanny Maria Teresa Turrion Borrallo is from. <p>Photo: &copy; Getty Images
The newborn stayed warm in a white heirloom blanket and matching bonnet. <p>Photo: &copy; Getty Images
Kate snuggled her little one tight when he made his debut to the world on the Lindo Wing steps, before the doting mom took him back inside to make sure he stayed warm enough. <p>Photo: &copy; Getty Images
Little Louis went home from the hospital in the same Britax Römer car seat that his big brother Prince George and big sister Princess Charlotte used. The cozy white cover was from Spanish brand Pasito a Pasito. <p>Photo: &copy; Getty Images
Those cheeks! The little one definitely shares some of his siblings' features. <p>Photo: &copy; Getty Images
Just a few hours old and already melting hearts around the world... including his mom Kate's! <p>Photo: &copy; Getty Images
Baby Louis was sound asleep despite embarking on his first car ride! <p>Photo: &copy; Getty Images
The little one slept soundly in his car seat as he was carried to Prince William and Kate's new seven-seater Land Rover to be taken home to Kensington Palace. <p>Photo: &copy; Getty Images
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