Hollywood stars Benicio Del Toro and Catherine Keener are secretly dating, according to reports.The pair was spotted enjoying a meal together at Los Angeles restaurant Green Door last week - and onlookers claimed love was in the air.A fellow diner tells OK! magazine, "He whispered into her ear, and she listened with rapt attention. He brushed his hand on her back. They had nice chemistry."Keener divorced husband of 17 years Dermot Mulroney in 2007. Single Del Toro has never married.

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