Just when we thought that Prince Louis couldn't get any cuter, the Duke and Duchess of Cambridge decided to share another adorable photograph of the little royal. In the precious snap, which was taken alongside Louis's official christening portraits, a radiant Kate can be seen cradling her laughing baby boy in her arms in the garden of Clarence House. And while we might never know what prompted such a sweet reaction from the 2-month-old, we have a feeling that cheeky Prince George and Princess Charlotte might be the reason behind those giggles.