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Britain's Prince George was to celebrate his first birthday on Tuesday with a party fit for a future king as his parents thanked well-wishers the world over for their support.
Prince William and his wife Catherine were to throw a private bash at their Kensington Palace home in London to mark the occasion, with royalty and close friends in attendance.
To mark the prince's birthday they released two new photographs of the family, which show toddler George fascinated by butterflies at the Natural History Museum in the British capital.
In a short message accompanying the pictures, William and Kate thanked the public for their generosity towards the little prince over the last 12 months.
"We would like to take this opportunity on George's first birthday to thank everyone over the last year, wherever we have met them, both at home and overseas, for their warm and generous good wishes to George and our family," they said.
In one of the new pictures released for his birthday, George is looking at a blue morpho butterfly that has landed on the back of his father's right hand.
The youngster, sitting on a bench with his parents, appears about to pick up the insect.
In the other picture, William, Kate and their son are transfixed by something above their heads.
The photographer, John Stillwell, said George, who is third in line to the throne, was "very lively and very sure of himself and confident -- a very determined young boy".
The shots were taken a few weeks ago. George is pictured wearing a pair of dungaree shorts, over a polo neck t-shirt, shoes and socks.
- Cherubic charmer -
For the party, the London Evening Standard newspaper said Kate has baked George's cake herself.
"The family will mark the birthday privately at Kensington Palace with close family and friends," a royal spokeswoman told AFP.
Newspapers said great-grandmother Queen Elizabeth II would join the party, though her husband Prince Philip is less likely to turn up as he has engagements to attend in Greenwich.
Meanwhile grandfather Prince Charles and his wife Camilla are in Scotland on their annual summer visit.
William and Kate, the Duke and Duchess of Cambridge, are determined to give George as much of a normal upbringing as they can, keeping him largely out of the spotlight.
But the cherubic royal has charmed onlookers during his few appearances in the public eye, particularly during the tour of Australia and New Zealand in April.
And his arrival on the scene has given the royal family a major feel-good factor boost.
"Prince George's outings are a reminder of what makes the monarchy so enduringly popular -- its humanity," said The Daily Telegraph newspaper.
"The lives of the royal family offer benchmarks to our own. They grow up along with us, experience joy, are touched by sorrow, and confirm that life is all the more pleasant when shared as part of the national community."