Jennifer Aniston loves telling dirty jokes.

The former 'Friends' star is famed for her clean-cut image but insists she's not as well behaved as people make out and has a crude sense of humour and likes to swear.

She said: "I'm not rude in front of people that I don't know, but I tell I dirty joke now and then - I'm not squeaky clean.

"I also like to swear. I would have to say f**k is my favourite curse word. That's a pretty good word."

Jennifer - who was previously married to Brad Pitt and is now dating Justin Theroux - also says she's happier than ever now she's learnt to accept herself.

The 42-year-old beauty told Britain's OK! magazine: "I think getting older you get more comfortable in your body, in your skin, who you are. And you feel you have more of a f**k it attitude.

"I've learnt that none of it really matters as long as you're enjoying yourself and having a really good time - and not hurting other people, of course."