Oprah Winfrey is an American media executive, talk show host, actress, and philanthropist. She is best known for hosting the talk show "The Oprah Winfrey Show" which aired for 25 seasons from 1986 to 2011. Winfrey has also acted in several movies, including "The Color Purple" and "A Wrinkle in Time." She is the founder of the Oprah Winfrey Leadership Academy for Girls in South Africa and has donated millions of dollars to charitable organizations. Winfrey is considered one of the most influential women in the world and has received numerous awards for her work, including the Presidential Medal of Freedom in 2013.