Oprah Winfrey is calling time on her legendary talk show.

The veteran host, arguably the most famous woman in America, will confirm her intention to quit live on her show today.

Tim Bennett, the president of Winfrey's production company Harpo, said in a statement: "Oprah will announce live on The Oprah Winfrey Show that she has decided to end what is arguably one of the most popular, influential and enduring programs in television history.

"The sun will set on the Oprah show as its 25th season draws to a close on September 9, 2011."