Charlie Day has gone naked with Jennifer Aniston in the pair's upcoming Seth Gordon film 'Horrible Bosses'.

The actor has talked about their first nude encounter.

"We were thrust into getting to know each other pretty quickly. We get naked in a dental office," the Daily Telegraph quoted him as telling PopEater.

"Jennifer Aniston is sexually aggressive towards me and demands I sleep with her or she's going to blackmail me into making my fiance think I'm sleeping with her.

"She has an elaborate way of doing that. I don't want the anxiety attack that I know I will have if I'm a scoundrel going into the wedding, so I avoid that," he added.

Charlie admits he knows absolutely nothing about Jen's personal life.

"I didn't even know she was married to Brad Pitt. She couldn't believe that I didn't know. But I had no idea, for real. And I frankly don't care," he said. (ANI)