He was in fine form at the weekend's royal wedding - while Princess Charlotte smiled and waved and was generally delightful, Prince George looked bored, annoyed and by the end of the ceremony, completely over it:
Which is why we're so surprised to see him smiling - wait, make that positively beaming - in the official royal wedding portraits that Kensington Palace released today.
We've never seen him looking so happy:
Which begs the question: what is he plotting?