The Duke and Duchess of Cambridge's son is the first member of the royal family to have his first birthday honoured with a new coin.
William and Kate, along with George's great-grandmother the Queen and Chancellor George Osborne approved the design of the sterling silver piece, which bears the heraldic royal arms and the year 2014.
Third in line to the throne and future king George turns one on July 22. There will be a limited mintage of 7,500 of the birthday coins, which will cost £80 each. The heraldic royal arms was originally created for the Queen and was last used on a coin struck for the British Exhibition in New York in 1960.