Rosie O’Donnell has let slip her worst ever chat show guest during a rare television appearance.

RadarOnline.com can reveal the former prime time presenter, 63, was giving an insight into her career when she was quizzed about the numerous A-list stars she grilled on the Rosie O'Donnell Show back in the nineties. Article continues below advertisement

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And when asked who her most difficult interviewee was, her answer came as a huge shock.

O’Donnell said: "One of the worst, who, I love the guy, but he's not good on talk shows: Keanu Reeves .

"He's so sweet, he looks gorgeous, I love all his movies, but he would not answer a question.

"I'd say, 'So, Keanu, how's it going? H

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