The world has followed his every move but now his first steps are grabbing all the attention.
Just over a month shy of his first birthday, Prince George showed the public how he has mastered the skill of standing on his own two feet and walking.
Clutching his mother's hand determinedly, the third in line to the throne shuffled along as the Duchess of Cambridge, 32, beamed with pride at her son's efforts.
Last week the Duchess had strongly hinted at an event to mark Sir Ben Ainslie's America's Cup team that her son had been taking his first steps, but this is the first time he has been pictured walking.
The prince will now keep the royal couple on their toes with his added - and purposeful - mobility.
He was taken out into the Cotswolds sunshine to support the Duke of Cambridge, 31, at a charity polo match on Father's Day.
The 10-month-old looked like an aspiring sportsman in the making as he keenly grabbed at the polo mallets lying on the ground while Prince William and Prince Harry competed.
Prince George. Photo / Getty Images
The young prince even seemed gripped by World Cup fever as he played with a soft football on the grass.
Wearing a white polo T-shirt under red and white candy striped dungarees, he was the centre of attention at the annual Jerudong Trophy match at Cirencester Park Polo Club in Gloucestershire.
Crawling around, grabbing at his mother's ankles and clearly intrigued by the horses, the future king looked as if he was having fun on the family day out.
At one point he did temporarily lose his cool, but a reassuring cuddle from his mother soon calmed him down.
The prince, who now has a full head of blond hair and looks strikingly like his father when he was a young boy, is already beating the Duke when it comes to getting around.
The Duke was a full month older by the time he became mobile on hands and knees when he visited Australia with his parents in 1983.
Yesterday the Duke helped his son to drink from a water bottle as the Duchess chatted to other guests.
The princes are regular players at the event, which raises money for good causes.