Sunday night’s Academy Awards had a very special guest on hand: Michelle Obama. The first lady, dressed in a silvery, shimmery evening gown by designer Naeem Khan, made a surprise live appearance from the Diplomatic Room of the White House at the end of the Oscars to help Jack Nicholson hand out the evening’s final and biggest award, best picture.

That, of course, turned out to be “Argo,” the movie about the CIA’s plan to rescue six Americans who managed to escape from the U.S. Embassy during the Iranian hostage crisis. The film turned out to be the night’s big winner, bringing home three of the seven awards for which it was nominated.

Other big winners included actor Daniel Day-Lewis, who scored the best actor award for “Lincoln,” and Jennifer Lawrence, who emerged victorious in the best actress category for “Silver Linings Playbook.” Ang Lee took home the prize for best director for “Life of Pi.”

— Posted by Tracy Bloom.