Melting hearts in his adorable printed sweater vest for his official photographs released at Christmas.
Visiting the Natural History museum with his parents in July 2014.
Stealing the show at little sister Princess Charlotte's christening in an outfit similar to one Prince William wore when he first met Prince Harry.
Looking adorable in blue for a day out at the polo with his mother the Duchess of Cambridge.
As cute as ever in a pale blue outfit, enjoying Trooping the Colour with Prince William.
A mini style icon as he waves to crowds outside the Lindo Wings ahead of meeting his sister Princess Charlotte for the first time.
Making a stylish duo with little sister Princess Charlotte in photos taken by the Duchess of Cambridge.
Enjoying play time with mum Kate at an event in Wellington during the royal tour.
Adorable all in white arriving for the start of the royal tour of Australia and New Zealand with the Duke and Duchess of Cambridge.
Stealing the show with a bright red cardigan during the royal tour.
Enjoying a day out at the Zoo in Sydney with his parents during the royal tour.
Rocking one of his trademark blue outfits during the royal tour with Prince William and Kate.
Looking adorable in his christening gown, a replica of the one used by Queen Victoria's children.
In colourful dungarees for a day out at the polo with his mother.