When Prince George and Princess Charlotte were introduced to the world, we thought we'd officially bore witness to the cutest kids who ever walked this earth.
But when a certain Prince Louis was added to the mix, we had to rethink everything.
Now, as the littlest Cambridge turns three, we can hardly believe how fast he's grown up next to his two elder siblings.
We first clapped eyes on the precious young prince just hours after he was welcomed to the world on the 23rd of April 2018. The next occasion was when his first official picture was released in time for elder sister Princess Charlotte's birthday.
Next came his Christening in July 2018, followed by Prince Charles' 70th birthday celebration portraits released in November.
Each year since, we've seen Louis in various stages. His second birthday snaps were a rainbow paint-fest to behold, and his first red carpet at a Christmas pantomime was an adorable moment in time we'd like to never forget.
To celebrate the world's cutest young royal (an arguable claim of course - but with overwhelming evidence!) we've rounded up his sweetest moments in the gallery below.
Keep scrolling and prepare to smile - a lot!
WATCH: Prince Louis arrives for his christening at the Chapel Royal. Gallery begins after video...
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