US President Joe Biden violated royal protocol while attending a G7 dinner reception in the United Kingdom, the Daily Mail has reported, citing Debrett's, a leading authority on royal etiquette. Biden's first time meeting the queen came in November 1982, when as a U.S. senator he travelled to the United Kingdom for a meeting of the British-American Parliamentary Group, the White House said Sunday. He said he did not think she'd be insulted if he said she "reminded me of my mother in terms of the look of her and the generosity".
After leaving Windsor, Biden will head off to a North Atlantic Treaty Organisation summit in Brussels on Monday, a U.S. -EU summit on Tuesday and a meeting with Russian President Vladimir Putin in Geneva the following day.
When asked by reporters if he had invited The Queen to visit the White House, President Biden replied: "Yes".
It generally is frowned upon for anyone to reveal the contents of their private talks with the Queen.
Speaking at Heathrow Airport before departing the UK, Biden said he wished he could have spoken to the Queen for longer.
She wore a summery pink Stewart Parvin dress, a hat by Rachel Trevor-Morgan and the diamond Jardine star brooch, believed to be one of her favourite pieces of jewellery.
Biden is the 13th president the Queen has met during her reign, of 14 who have been in power across the pond.
The couple landed in the grounds just before 5pm, a few minutes ahead of schedule, and were greeted by the Queen in the castle's quadrangle.
The tea in the castle's Oak Room comes after the Bidens met the Queen on Friday when she attended a reception for G7 leaders at the Eden Project.
The Queen's actual birthday falls on April 21, but Trooping the Colour is staged on the second Saturday of June each year. Sunday's high-profile reception for the Bidens, which included a military band playing both the British and USA national anthems, means she has now formally met 13 of the last 14 sitting USA presidents - barring