London, July 16 - 'Batman Begins' star Christian Bale has once again lost a lot of weight to play a drug addict ex-boxer in his new film.

Dailymail.co.uk reports that Bale is playing Dicky Eklund, the famous boxer turned cocaine addict in director David O. Russell's 'The Fighter'. The Welsh actor was spotted on the sets of the movie in Boston, Massachusetts and was looking very thin.

In 2004, Bale had lost a lot of weight to play a troubled worker in 'The Machinsit' by not sleeping at all and eating only coffee and apples. Shortly after wrapping up the film, Bale gained weight for his role in 'Batman Begins'.