12/04/2012 05:25 pm ET

Extreme Method Acting: 15 Actors Who Have Taken The Craft To Another Level (PHOTOS)

The art of method acting has long been a favored technique of Hollywood heavyweights seeking to perfect their craft. These days, however, the unorthodox practice is getting some extra attention thanks to stars like Shia Labeouf and Daniel Day-Lewis.

For his part in Lars Von Trier's upcoming film, "Nymphomaniac," Labeouf revealed that he actually had sex on camera. Day-Lewis, on the other hand, became so immersed in his performance in "Lincoln" that he began to sign his text messages "A" for Abraham.

While Anthony Hopkins might not be impressed by method acting, the 15 actors in the slideshow below seem to believe in its power. Whether it's through extreme weight loss or embodying the characters' quirky traits offscreen, their performances show us just how far they are willing to go in the name of art.

When Method Acting Goes Too Far?