Prince George totters confidently towards the camera in this pic, released to mark his first birthday which falls on Tuesday.

It was tweeted out by an official palace account.

Kate and William decided on the Sensational Butterflies exhibit at London’s Natural History Museum as the location for the portrait, People reports. The photo was taken on July 2 and photographer John Stillwell had the honors. John revealed that the little prince was “very quick” on his feet at the shoot!

“He’s quick on his feet,” John told People. “He was walking towards me – I was kneeling down to take the picture and he was on top of me as soon as he started walking. He was very quick. He looked really steady on his feet.”