Oprah Winfrey is an American media executive, actress, talk show host, television producer and philanthropist. She is best known for her talk show The Oprah Winfrey Show, which was the highest-rated television program of its kind in history and was nationally syndicated from 1986 to 2011 in Chicago. 

In 2007, USA Today ranked Winfrey as the most influential woman and most influential black person of the previous quarter-century. Ladies Home Journal also ranked Winfrey number one in their list of the most powerful women in America and Senator Barack Obama has said she "may be the most influential woman in the country". In 1998, Winfrey became the first woman and first African American to top Entertainment Weekly's list of the 101 most powerful people in the entertainment industry. Forbes named her the world's most powerful celebrity in 2005, 2007,2008, 2010, and 2013.

As chairman of Harpo Inc., she was named the most powerful woman in entertainment by The Hollywood Reporter in 2008. She has been listed as one of the most powerful 100 women in the world by Forbes, ranking fourteenth in 2014. In 2010, Life magazine named Winfrey one of the 100 people who changed the world, alongside such luminaries as , Elvis Presley, and Lady Mary Wortley Montagu. Winfrey was the only living woman to make the list.

 By confessing intimate details about her weight problems, tumultuous love life, and sexual abuse, and crying alongside her guests, Time magazine credits Winfrey with creating a new form of media communication known as "rapport talk" as distinguished from the "report talk" of Phil Donahue: "Winfrey saw television's power to blend public and private; while it links strangers and conveys information over public airwaves,  

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