As somebody who also had an open bite, I’d be surprised if he didn’t have one. It’s especially noticeable in the Batman films where the only part of his face visible in some scenes is his mouth. He cannot seem to close his teeth to make his hissing sibilants, and has to resort to pressing his tongue hard against the underside and lower back of his top teeth to avoid lisping.
Here’s the article from The Guardian that explains how he got the lisp:
What a maniac. He basically maimed himself for a role in a mediocre movie.
Well, American Psycho is a cult classic that kicked off Bale’s adult career.
I don’t think he has dentures but I do believe that his speech could be improved with orthodontic treatments.
How weird. This movie cemented my disgust for Christian Bale basted solely on his cruel mouth.