Oprah Gail Winfrey (born 29 January 1954) is an American talk show host, television producer, actress, author, and media proprietor. She is best known for "The Oprah Winfrey Show," which was the highest-rated talk show in television history. She transitioned from a talk show host to a media mogul, founding Harpo Productions and the Oprah Winfrey Network (OWN). Winfrey is often cited as the most influential woman in the world. She is North America's first black multi-billionaire. Her "Oprah Effect" can turn books into bestsellers and products into sensations. She is also a dedicated philanthropist, particularly in education (Oprah Winfrey Leadership Academy for Girls).