Obamas are Black Tie Amazing! Michelle O. in Ralph Lauren...

 President Barack Obama and First Lady Michelle Obama (wearing a stunning portrait collared Ralph Lauren gown from his Fall 2011 collection. Scroll down to see the dress on the runway) arrived at Winfield House, the residence of the Ambassador of the United States of America, in Regent's Park, on May 25, 2011 in London, England. The 44th President of the United States, Barack Obama, and First Lady Michelle are in the UK for a two day State Visit at the invitation of HM Queen Elizabeth II. Last night they attended a state banquet at Buckingham Palace and today's events include talks at Downing Street and the President will address both houses of Parliament at Westminster Hall.

First lady Michelle Obama stands with President Barack Obama, not pictured, as they wait for the arrival of Britain's Queen Elizabeth II and Prince Philip for a reciprocal dinner at Winfield House in London, Wednesday, May 25, 2011.

[photos via Getty Images and AP Photo]

First Lady Michelle Obama's gown from Ralph Lauren Fall 2011

President Barack Obama and first lady Michelle Obama hosted a dinner for Queen Elizabeth and Prince Phillip, Duke of Edinburgh, at the Winfield House in London May 25, 2011.