The Queen hosted G7 world leaders at an evening reception, where she met the US President and other world leaders.
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.
William and Kate are taking part in their first G7 events – another milestone in their progression as senior royals.
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.
“Joe and I are both looking forward to meeting the Queen.
“That’s an exciting part of the visit for us.
“We’ve looked forward to this for weeks and now it’s finally here.
“It’s a beautiful beginning.”