London, Aug 27 - 'The Hangover' actor Bradley Cooper has blamed 'The Dark Knight' star Christian Bale for costing him the lead role in forthcoming superhero film 'The Green Lantern'.

Cooper auditioned to star in the upcoming comic book movie adaptation but ruined his screen test by imitating Bale's husky-voiced portrayal of the caped crusader, reports imdb.com.

The actor is sure the casting agents were laughing at his 'Batman' impression and that convinced them to hand the role to Hollywood hunk Ryan Reynolds.

'I couldn't not do Christian Bale's 'Batman' when I was doing the audition. I don't know what it was. You put a mask on, and I actually said, 'I'm Batman.' When I walked back and saw (the playback) I thought, 'Oh my God!' It looked like a 'Saturday Night Live' sketch. I was like, 'Oh, I'm not getting this',' Cooper said.