Prince Charles and his other son Prince Harry were also present, along with the heads of state and government representing about 95 other countries.
The queen spoke at the reception, welcoming the international representatives to the country.
“Many sports played in these Games have their historic roots in this country, and as a nation we have an abiding passion for sport, as well as a tradition of fair play and a good-natured sense of fun,” she said, according to Britain’s Daily Mail.
Michelle Obama, Mitt and Ann Romney, along with the Prince of Wales, Duchess of Cornwall, Duke and Duchess of Cambridge and Prince Harry, later attended the Olympics opening ceremonies, which are on a delay in the USA and will be televised Friday evening.
The first lady tweeted from the ceremonies that she had “never seen anything like this,” employing lots of exclamation points.
At Opening Ceremonies of Olympics...have never seen anything like this..it is truly an amazing moment...the stadium is pounding!!!!! -mo— Let's Move! (@letsmove) July 27, 2012