Oprah Winfrey is planning to announce that she is ending her show at the end of the 2010 - 2011 television season. That would bring her current broadcast schedule to an end in September of 2011 at the completion of her 25th season.

Sources tell ET that Lady O will announce the news on tomorrow's live episode of "The Oprah Winfrey Show."

Keep checking back here for more on this developing story.

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