20 Things You Didn't Know About American Psycho

5. Christian Bale Spent Three Hours Per Day Working Out To Achieve Patrick's Physique

Given that Christian Bale touted a rather unassuming physique prior to winning the role, he had to put in some serious work in order to resemble the quality physical specimen described in Ellis' book.

Long before shooting started, Bale spent months working out on his own, and once the project was locked in, he spent three hours per day working with a personal trainer to achieve the chiselled look seen in the film.

This is of course just the first of countless impressive physical transformations Bale has undergone over the course of his career, and clearly the one that gave him a taste for it in the first place.