Today Kensington Palace released the first of 3 portraits to mark the first birthday of His Royal Highness, Prince George of Cambridge. The other two will be released on Monday night. All three photographs were taken by PA staff photographer, John Stillwell, when Prince George visited the "Sensational Butterflies" exhibition at the Natural History Museum with The Duke and Duchess of Cambridge earlier this month. The Duchess of Cambridge is Patron of the Natural History Museum. ...