Jennifer Aniston has ruled out ever dating an older man because she has done it once and admits she felt really awkward.

Unlike her character in new film Rumor Has It, who dates Kevin Costner's cad, Aniston insists she would never dream of dating anyone 14 years older than her.

She says, "That never pans out because, I think, eventually you grow up.

"When I was, like, 21 I dated an older man, about 18 years older. It was stupid. It was fun for a minute and then I was like, `Can I get you some tea or a crutch?'"