US President Joe Biden has invited Queen Elizabeth II to the White House after Her Majesty welcomed POTUS and his wife, FLOTUS Jill Biden, at Windsor Castle.
The US first couple and the 95-year-old British monarch met for afternoon tea.
"I don't think she’d be insulted but she reminded me of my mother, the look of her and just the generosity", Biden told reporters after their rendezvous.
"She wanted to know what the two leaders that I - the one I'm about to meet with, Mr Putin, and she wanted to know about Xi Jinping", POTUS added.
Shortly after the meeting with the Queen, which coincided with the third and final day of the G7 summit, the Bidens departed from London's Heathrow Airport.
This wasn't their first meeting on the sidelines of the G7 summit: the US president and the first lady met the Queen on Friday when she attended a reception for G7 leaders at the Eden Project.
Joe and Jill Biden purportedly arrived five minutes after the Queen got there with her son, Prince Charles, and the Duke and Duchess of Cambridge, Prince William and Kate.
Sunday's high-profile reception for the Biden couple, which included a military band playing both the British and US national anthems, means the Queen has now formally met 13 of the last 14 US presidents, excepting Lyndon B. Johnson, since she assumed the throne in 1952.