Prince George turned one on July 22, 2014!
It has been a year of adventures and firsts for his 'royal cuteness'. He's learnt to walk, caused 'carnage' on a playdate with his second cousin Mia Tindall, and joined his parents on a Royal tour of Australia and New Zealand.
Phew! We hope he's managed to find plenty of time to nap despite his busy schedule!
In December 2012, St James's Palace announced that the Duke and Duchess of Cambridge were expecting their first child.
Seven months later, at 4.24pm on July 22, George was born in the Lindo Wing of St Mary's Hospital in Paddington. Prince William was by Kate's side as they welcomed their 8lbs 6oz son into the world.
George left hospital the next morning with Kate and Wills - who admitted that their first night as a family had not been a quiet one:
"He's got a good pair of lungs on him," William joked.
Two days later Clarence House released details of the Royal baby's name in a tweet, and the 'Royal baby' formally became Prince George:
Prince William has been refreshingly honest about how tough the first year of parenthood can be:
"At the moment, the only legacy I want to pass on to him [George] is to sleep more and maybe not to have to change his nappy quite so many times," the new dad said.
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George was christened on October 23, 2013, when he was four months old. It was an intimate affair with just 22 guests, including his seven godparents.
George has grown a lot since then and his boisterous nature has continued to develop as he's progressed in leaps and bounds - William says he is now "charging around and opening doors."
It's believed that George enjoyed an early Peter Rabbit-themed birthday party on Saturday July 19, at the Berkshire home of his grandparents, Michael and Carole Middleton.
But George's main party will be kicking off on July 22, at his Kensington Palace home. Kate and William are thought to be keeping the affair 'low key,' - well, as low key as a party can be when your great-grandmother's the Queen of England!
HRH Queen Elizabeth II is expected to attend, along with Prince Harry, the Middletons, and some of George's godparents. Unfortunately George's paternal grandfather Prince Charles and the Duchess of Cornwall won't be able to make it, as they are currently on a trip to Scotland.
Whatever his second year has in store for George, one thing's for sure - if the latest pics of the Prince are anything to go by, he'll certainly be continuing to give his parents the run around.
Click through the gallery below to see highlights from HRH Prince George of Cambridge's first year