First lady to attend Olympic Games opening From Emily Schultze, CNN White House Producer March 13, 2012 -- Updated 1331 GMT (2131 HKT) Michelle Obama will lead the U.S. delegation to the opening of the London Olympics The opening ceremony takes place on July 27 Washington (CNN) -- First lady Michelle Obama will lead the U.S. delegation to the opening ceremonies of the London Olympics, an administration official said Tuesday. Obama will announce her upcoming trip at an event later Tuesday with Samantha Cameron, the wife of visiting British Prime Minister David Cameron. The Olympics opening ceremony will take place on July 27.