Prince George has proved the old adage true that out of the mouths of babes comes wisdom, after he left Prince Harry embarrassed with an insightful question.
When US president Barack Obama and wife Michelle were recently invited to dinner with the Duke and Duchess of Cambridge and Harry - the young royal stole the show.
The First Lady revealed the two-year-old prince repeatedly asked "uncle Harry, why are you so quiet?", during a joint interview with the prince for ABC News' show Good Morning America to mark the start of the Invictus Games in Orlando, Florida.
The pair have developed a friendly rivalry over whether the US will triumph over the UK at the games, after the Obamas posted their Invictus "boom" video challenge and Harry replied with his own filmed clip featuring a cameo appearance by the Queen.
Mrs Obama said about Harry: "I have to say the most precious thing if you haven't already fallen in love with him, is to see him with his nephew."
Speaking about her night with the Cambridges and Harry at Kensington Palace, she said about George: "He said 'uncle Harry, why are you so quiet? Why are you so quiet?'"
Harry said "so embarrassing", and Michelle turned to him and said: "And I was like 'you're not quiet'."
The prince replied: "(I was on my) best behaviour, I'm normally throwing him around the room and stuff."
He also talked about how he approached the Queen to film the riposte to the Obamas' Invictus video.
Harry said: "Mrs Obama came to us with the challenge and I didn't know what to do, she dragged her husband into it - (he) happened to be the president - slightly awkward."
The First Lady said her husband turned the screw and challenged the prince to get the Queen involved: "He said if you can get your grandmother to do this then you can drop the mike."
Harry said the US leader was so confident he felt he had to approach his grandmother.
He said: "I didn't want to ask the Queen, because I didn't want to back her into a corner, but when I showed her the video and told her she was like 'right, what do we need to do - let's do this'."