(Cover) - EN Showbiz - Mila Kunis says she looked like Gollum while she was making Black Swan.

The actress plays a dancer in the new movie, in which Natalie Portman also portrays a ballerina. The two women trained intensely before shooting began, making sure they had mastered all the moves they had to perform.

Both have discussed how tough the fitness regime was, with Mila training five hours each day for four months. She cant believe how toned and fit she became, and has likened her figure to that of bald and wizened hobbit Gollum in The Lord of the Rings. Gollum, portrayed by Andy Serkis in the movie adaptations, had his life prolonged unnaturally, and is sinewy and fast on his feet.

I dont think I had an ounce of body fat on me when we were filming I was 20lbs. lighter than normal. I was just bone. But muscular bone, she explained. I looked like Gollum! But by two weeks after filming, I was almost back to normal again.

Restricting her diet didnt sit well with Mila, as she loves eating. She gave the experiment her all though, except when a special day approached. The 27-year-old decided to ditch calorie counting for 24 hours, but soon regretted her decision.

I was on a 1,200 calorie per day diet which was all portion control. I had a food delivery service and I ate five small meals a day, every three hours, she told British magazine InStyle. But on my birthday, I was like, Forget the diet, Im going to have a hamburger! I suffered the next day, though, because your body stops having the ability to digest bad food! (C) Cover Media