Jennifer AnistonJennifer Aniston is finding it hard to give up smoking while Vince Vaughn continues to indulge in the habit.

A source told the Daily Express: “Jen has been in trouble with her doctor because she went to him for help in giving up and she hasn’t.”

“Every time she tries, there would be Vince puffing away. He’s not helping in the least and when she tells him off about it, he laughs.”

But Jennifer does plan on giving up one day: “She’s convinced that the day she falls pregnant will be the day she and Vince stop. She just needs that extra incentive.”

Meanwhile, Jennifer’s publicist has dismissed rumours that her client and Vince Vaughn have got engaged after Jennifer was spotted wearing a new diamond ring recently: “Jennifer is past the point of responding to any of these ludicrous rumours”.