The youngest royal baby turns one today, and our hearts have officially melted. Kensington Palace revealed three precious photos of Prince Louis - taken by the Duchess herself at the family's Norfolk home - celebrating his first birthday. 

How cute are his rosy cheeks? 

We've a got a poser everybody!

We haven’t seen Prince Louis since his Christening and today we can confirm the major resemblance to his siblings Prince George and Princess Charlotte.  

His royal cuteness is fifth in line to the throne after his older bro and sis. 

Here's a timeline of Prince Louis' adorable appearances:

First appearance in public...so small! 

"How many more pictures are you going to take of me?"

His christening in July last year. Also, can we just point out that the Duchess was glowing!

All smiles with mummy...