Oprah -- Kaput in 2011

11/19/2009 8:51 PM PST

Oprah -- Kaput in 2011

Oprah Winfrey just announced to her staff ... next season will be the last for her TV show.

An Oprah insider tells TMZ "Oprah announced there will be layoffs after this season."

The final show will air in Sept 2011.

2011 marks the 25th year of the show -- one of the most successful in TV.