Prince George is a "lively, confident and very determined young boy", a photographer who has captured the key stages of his lives has said.
The Prince has been photographed by the Press Association's John Stillwell with his arms outstretched and walking confidently in an official picture released ahead of his first birthday on Tuesday.
"Prince George was very lively and very sure of himself and confident - a very determined young boy," Stillwell said.
"When you have children yourself you don't realise they grow up in such a short space of time, it's always other people saying how big they've grown.
"So having seen him soon after he was born and at his christening three months later, he's now gone from a baby at his christening to a toddler, that's the biggest change.
"And who does he look like? I'd have to say his dad, William."
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William and Kate thank the world for "generous good wishes" as new images mark a year since the birth of a future King.