Jolie has also told of how her interest in knives as a teenager left her with scars on her body.

The actress who is currently with Brad Pitt, with whom she's expecting twins says the incident, which caused scarring on her abdomen and thigh, happened when she was 14 and "curious about vampires," reports Showbizspy.com

She reveals, "When I was 14, I collected knives. My first boyfriend and I ended up getting into some fighting in bed and being silly. People think that happens every time I go to bed.

"It was actually something he never wanted to do again. It was a mistake and we really hurt ourselves. It was just being young, you know, when you're curious about vampires and that kind of thing. Just experimenting. It was an accident and I ended up in hospital."

The 'Wanted' star, 33, who also recently attended the premiere of her hit new animation flick Kung Fu Panda with co-star Jack Black in Cannes, reportedly married first husband, Jonny Lee Miller, wearing a shirt with his name written on it in her own blood.

She and her second husband, Billy Bob Thornton, wore vials of each other's blood around their necks.