It is the Prince of Wales' 71st birthday today and baby Archie has officially wished his grandpa a very happy birthday (thanks to his mother and father's official Instagram account). The beautiful black and white picture posted is from Archie's christening and shows three generations all together.

Archie wishes his Grandpa, Prince Charles, a happy birthday

The caption of the photo reads, "Happy birthday to His Royal Highness The Prince of Wales - Sir, Pa, Grandpa! "! This beautiful tribute is from the Sussex family of three and we are so delighted they decided to share a never before seen picture from Archie's christening. We also wish his Royal Highness a very happy birthday and look forward to seeing how other members of the royal family celebrate the Prince of Wales today. 

William and Kate wish Prince Charles a happy birthday on Instagram