Mr Porteous, who also took photos of the Prince when he turned three, was invited to capture the official photographs while on location as the family’s private photographer for Prince Louis’ christening.
He said: ‘It was a privilege to take this photograph of Prince George, and I am delighted that the Duke and Duchess have chosen to share it. I wish His Royal Highness a very happy fifth birthday.’
The photo taken at Clarence House shows the Prince as a happy and confident little boy and comes after an exciting year for the youngster, from completing his first school year to once again joining his great grandmother the Queen on Buckingham Palace’s balcony to mark her official birthday.
The future king is likely to spend the weekend celebrating his big day with his parents.
But according to reports the party may take place in the Caribbean as William and Kate are rumoured to have taken their children on a summer break to the exclusive island of Mustique.
Prince George Alexander Louis of Cambridge was born at the private maternity wing of St Mary’s Hospital, Paddington, the Lindo Wing, at 4.24 pm on 22 July 2013, weighing 8lbs 6oz.
He made his public debut in front of the world’s media on the hospital steps one day later, wrapped in a white merino wool shawl, cradled in his proud parents’ arms.
A great-grandchild to the Queen, he will be the 43rd monarch since William the Conqueror obtained the crown of England if, as expected, he follows the reigns of the Prince of Wales, then William.
