**FILE** This Aug. 25, 2008 file photo shows Michelle Obama, wife of Democratic presidential candidate, Sen. Barack Obama, D-Ill., and daughters Malia, left, 10, and Sasha, right, 7, wave to the audience the Democratic National Convention in Denver. This much is clear: Malia and Sasha Obama are welcome on the set of "Hannah Montana." But any talk that the Obama daughters are likely to appear on the popular Disney Channel show seems to be just that, talk. And it's been mostly from Billy Ray Cyrus, father of "Hannah Montana" star Miley Cyrus. (AP Photo/Jae C. Hong,File)