He is shown on a boat, stroking the family dog, Otto, and clambering over rocks with his younger brother, Prince Louis, eight, before pointing at something that caught his eye out at sea.
The Prince and Princess of Wales have taken to releasing a short video montage to accompany a more formal portrait on their children’s birthdays, to thank the public for their kind messages.
Prince George was born at 4.24pm on July 22, 2013 in the private Lindo Wing at St Mary’s Hospital in Paddington, London.
At the time, he was styled His Royal Highness Prince George of Cambridge and was third in line to the throne.