The @KensingtonRoyal account tweeted:
"Look who's turning two tomorrow!
The picture was taken by renowned photographer Mario Testino in the gardens at Sandringham House, and shows the birthday boy in the arms of his father, the Duke of Cambridge.
The London Evening Standard reports:
"The young prince, who is third in line to the throne, was pictured grinning in his father's arms ahead of the occasion.... It was part of the series of official photographs taken by the renowned photographer following Princess Charlotte's baptism on Sunday 5th July."
A spokesman for Kensington Palace said:
"This photograph captures a very happy moment on what was a special day for The Duke and Duchess and their family. They are very pleased to share this picture as they celebrate Prince George's second birthday."
It is reported that Prince George's second birthday will be marked by the family with a low-key celebration at Anmer Hall, their home in Norfolk on the Sandringham Estate.
I wonder if his very Royal granny will be popping in for a cup of tea and a slice of birthday cake?