Michelle LaVaughn Robinson Obama (born January 17, 1964) is a former First Lady of the United States and the wife of the 44th president of the U.S., Barack Obama. She is also a lawyer and an author. She is the first African American First Lady of the United States. Like many other First Ladies, Mrs. Obama has worked as a spokesperson for a cause. The cause she supports is better nutrition and exercise for children. She has done work with the Disney Channel and Nickelodeon to support this cause. 