Photographs of the young prince at play in the grounds of Anmer Hall in Norfolk have been released by the Duke and Duchess of Cambridge to mark their son's third birthday.
William and Kate thanked well-wishers for messages of support they have received marking their eldest child's milestone on Friday.
Four images have been issued by the royal couple showing the young prince at play on a swing and with the family dog Lupo.
A Kensington Palace spokesman said: 'The Duke and Duchess hope that people will enjoy seeing these new photographs.
'They would like to thank everyone for all the lovely messages they have received as Prince George celebrates his third birthday.'
One of the pictures, taken in mid-July by photographer Matt Porteous, show George standing barefoot on a swing. In another image he is sitting on the swing looking at the camera.
The prince is shown walking and in the final image he is sitting on a rug with the family pet Lupo.
Mr Porteous said: 'I really enjoyed the opportunity to take these photographs of Prince George. It was a very relaxed and enjoyable atmosphere. I'm honoured that they have decided to share these images with the public to mark his third birthday.'
In the picture showing George with the family dog, he can be seen holding a partially eaten ice cream close to Lupo's mouth.
The cocker spaniel is a strain of the breed traditionally used as a gundog - and they can cause havoc around the house.
An RSPCA spokesman said: 'It is lovely that Prince George is trying to help keep his family dog, Lupo, cool in these high temperatures.
'We would advise people to be cautious when giving their dogs food meant for human consumption as some items, like chocolate, can be highly toxic to dogs and dairy items can be difficult for them to digest.
'Instead of ice cream we would suggest making an ice lolly from pet-friendly ingredients. Making these can be really fun for children and the end product is both safe and enjoyable for dogs.'
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