See 4 Generations of the Royal Family in an Adorable New Photo

 Perched proudly on a pile of foam blocks, but holding daddy's hand just in case, Prince George poses for his very first postage stamp alongside his father, his grandfather – and the great-grandmother whose face has appeared on more stamps than anyone in history.

Prince Charles, Queen Elizabeth, Prince George and Prince William posed for a stamp

Four generations of the Royal family posed for an adorable photo that was released Tuesday and is set to appear on a British stamp. Prince Charles, Queen Elizabeth, Prince George and Prince William can be seen grinning in the portrait, which was taken by photographer Ranald Mackechnie last summer in the White Drawing Room at Buckingham Palace, PEOPLE reports. A smiling 2-year-old Prince George can be seen standing on a stack of black-and-white foam blocks as he holds his father’s hand.

The image was released in celebration of the Queen’s 90th birthday on April 21, according to PEOPLE.