The Queen has asked the question possibly on the mind of every G7 world leader Are you supposed to be looking as if youre enjoying yourself?
Known for her wit, used to put nervous guests at ease, the Queens quip came as presidents and prime ministers smiled for the camera during a family photo after an evening reception.
Following a day of political talks, the soft diplomacy of the monarchy was evident when three generations of the royal family gathered to welcome the leaders to Cornwall.