Oksana to Oprah: So about Mel Gibson...

9/29/2010 1:05 PM PDT

Oksana On Oprah -- Oksana Grigorieva Interview with Oprah Winfrey Show

TMZ has confirmed ... Oksana Grigorieva will do a sit-down with Oprah Winfrey.

Sources tell us it's a done deal. Oksana will appear on the "Oprah" show to talk about her claims against and relationship with Mel Gibson.

Us Weekly first reported the story.