The Queen hosted G7 world leaders at an evening reception when a day of political talks gave way to the "soft diplomacy" of the monarchy.
Three generations of the royal family were present for the event staged at the Eden Project in Cornwall for presidents and prime ministers and their partners.
The Queen was joined by the Prince of Wales, the Duchess of Cornwall and the Duke and Duchess of Cambridge.
The Cambridges are taking part in their first G7 events – another milestone in their progression as senior royals.
The monarchy does not wield power but has influence and uses what is known as "soft diplomacy" to help the UK renew and strengthen friendships with its allies and partners around the world.
Her Majesty The Queen speaks to President Joe Biden and First Lady, Dr Jill Biden as she arrives for the G7 leaders summit reception & dinner at the Eden Project
Credit: Andrew Parsons / No10 Downing Street
The Queen smiles as she talks to President Joe Biden and the First Lady Jill Biden
Ahead of the arrival of the royal family, many of the G7 leaders, some with spouses, walked through the flora and fauna at the visitor attraction on their way to the reception.
Prime Minister Boris Johnson and wife Carrie were waiting to greet the royal party when they arrived.
The Queen walked just ahead of Charles and Camilla and they were followed a few paces behind by William and Kate.
After a brief exchange of words between Mr Johnson and the Queen, she led the way into the reception and was followed by the senior royals.
Last to arrive after the royal family was US President Joe Biden with First Lady Jill Biden.
The Queen met the G7 leaders at the Eden Project in Cornwall
After the 40-minute reception, they moved to an area to take a socially distanced group photo, and after taking their seats and posing for a few moments, the Queen said: "Are you supposed to be looking as if you’re enjoying yourself?"
The leaders around the Queen laughed and Prime Minister Boris Johnson said emphatically "yes".
Mr Johnson, who is hosting the summit in Cornwall, added: "We have been enjoying ourselves – in spite of appearances."
Mrs Merkel walked over to the Queen and thanked her for posing for the picture, saying: "Thank you for doing that for us."
The Prime Minister’s wife Carrie Johnson rented her entire outfit for the evening. She fashioned the ‘Cinderella’ dress, by The Vampire’s Wife, retail £950, but rented from HURR Collective, from £77 per day. Her shoes are Prada bow-detail pumps, retail £645, but rented from My Wardrobe HQ from £13 per day, while her bag is a Gucci suede shoulder bag, retail £1,200, but rented from My Wardrobe HQ from £21 per day.
Jill Biden chose a Gabriela Hearst Karban trench coat ($2,750) and heels by Marion Parke ($495).
The Duchess of Cambridge wore a white Alexander McQueen coat dress with a vintage Josef beaded clutch bag.