Prince George celebrates his third birthday this week.
Third in line to the throne and future king, George turns three on Friday July 22. Here are 10 things we know about him.
1. He loves planes
With an air ambulance pilot as a father, George was always going to be immersed in the world of flying. You only had to look at his face as he watched the flypast from the palace balcony to tell he was in his element, and at the Royal International Air Tattoo, the youngster even asked Kate whether he could fly a Red Arrow.
2. He's noisy
George already has a reputation for being loud, with Kate saying this was the reason she did not bring him to church at Sandringham on Christmas day. But he is showing no signs of quietening down. William confessed of his children in May on a visit to the Royal Marsden Hospital in London: "They're both doing very well at the moment - noisy but lovely."
3. He's mastered the art of the royal wave
George waved happily to the crowds as he toured the Royal International Air Tattoo earlier this month. As a toddler, he went to meet his new baby sister at the Lindo Wing and gave a wave despite being confronted with banks of cameras outside the hospital.
4. He's getting into gardening
George's grandfather the Prince of Wales has been encouraging him to plant trees at Charles' Highgrove estate. Charles told BBC Radio 4´s Gardeners' Question Time: "So we've planted it together and shovelled in the earth. Because that's the way, I think, when you're very small. And then you see, each time they come you say do you see how much the tree has grown? And you hope that they take an interest.".
5. His favourite book is The Gruffalo
George loves Julia Donaldson's best-selling rhyming tale of a quick witted mouse who takes a stroll through the deep, dark wood, William has said.
6. He's a fan of the Natural History Museum
The prince is a regular visitor to the central London tourist attraction which is close to Kensington Palace, and is especially fond of the 3D sculptures.
7. He has a "Gan Gan"
She may be the monarch, but the Queen is known to her great-grandson as "Gan Gan". The Queen also leaves out little gifts for her great-grandchildren when they come to stay.
8. He might need to keep his younger sister in check
Charlotte is quite feisty, according to Kate. The Duchess said George is a "really lovely little boy" and revealed she "hopes that George will keep Charlotte in order".
9. He has a vintage wardrobe
The Duke and Duchess have dipped back into the carefully preserved royal collection of clothes to dress George in outfits that William wore as a child - including a pale blue romper suit for Trooping the Colour in 2015.
10. It will not be long until he starts school
William and Kate have been deciding where to send George, who is due to begin full-time school in September 2017 aged four. The Duke said they are "just trying to sort out schools now". The prince is expected to be privately educated.