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

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.

[PEOPLE]