Robert Pattinson rid himself of "parasites" after he found fame.

The 26-year-old actor's life changed dramatically when he was cast in the successful Twilight film franchise. The heartthrob joked that if he had the choice, he would prefer to be the one living off other's generosity rather than handing out freebies.

"My circle of friends narrowed pretty quickly," Robert said. "I like to be the parasite, not the other way around."

Fame has not only affected Robert's relationships with others, it has made him change as a person too.

The star features on the cover of the latest issue of Black Book magazine, where he was made to look as if he was covered with tattoos. While the body art was temporary, Robert has made drastic changes for photoshoots he's been involved with.

"I'm on an all-liquid diet," he explained to the publication. "I had to be shirtless for a photoshoot so I asked a nutritionist what's a diet in which you can still drink as much as you want. She said a liquid diet.

"I was so impressed with myself yesterday. I took a pee that was four minutes long."