British movie star Rob Pattinson gave up beer and regular meals to get into shape for his role as a toned vampire in much-hyped new film Twilight.

The 22 year old admits he was a little out of shape when he landed the role in director Catherine Hardwicke's film and decided it was time to get fit, so he could portray the movie's "ideal man."

For two months he spent three hours a day kickboxing and at least two hours running - and he quit drinking alcohol and limited his meals to just one a day.

He tells Eonline.com, "I was just trying to lose, like, every ounce of body fat, so when I took off my shirt, I would look like an alien. I thought that kind of worked for the story. The idea of taking my shirt off and looking like some sort of Adonis? Everyone would just laugh."

But his weightloss plans went awry when he lost too much weight - and Hardwicke scrapped shirtless scenes as a result.

He says, "I just looked so different. I was so much more muscular than I had ever been in my life, but I looked weird."

So, Pattinson gave up his diet regime and admits during filming, "I was on a full cheeseburger diet."

(This news article provided by World Entertainment News Network)