Jennifer Aniston find it's difficult to fake chemistry with leading man

Jennifer Aniston finds it hard to fake chemistry with a leading man. So far, she has been acting along with famous actors such as Clive Owen, Vince Vaughn and Owen Wilson.

She said: "You can't buy chemistry. You can't train it. On the first day of rehearsal it's like, 'This is good.' You know it when it happens and boy do you know it when it's not there."

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