Physical transformation key for me to enjoy acting: Christian Bale

From the skeletal insomniac in "The Machinist" to the pot-bellied con artist in "American Hustle", Hollywood superstar Christian Bale is that rare artist who stops at nothing to get under the skin of his characters.

This "transformation" is the key to his acting and keeps the process intriguing and interesting, Bale said in an interview to PTI.

"It's not necessarily what everybody does. I greatly admire people who are able to be themselves and be entertaining and be one thing all the time. There is an incredible talent to that. I don't have that.

"I like to see how much I can take myself out of each and every character I play. I actually enjoy that I don't have a particular technique and it change all the time. Sometimes it works, sometimes it doesn't," Bale, who is currently in India to promote Andy Serkis' Mowgli: Legend of the Jungle for Netflix, said.

The actor, who has spoiled Batman forever for other artistes with his masterful depiction of the angst-ridden superhero in Christopher Nolan's critically-lauded and commercially successful trilogy, said people often attach the tag of "method actor" to him but the term is alien for him.

Not being a trained performer, the 44-year-old approaches every role with some apprehension and that one question everybody ponders over -- Oh god, how am I gonna do this?