Los Angeles, Jan 27 (TIWN): Hollywood star Bradley Cooper has admitted that his passionate approach to work can occasionally make life difficult for some of his co-stars.

Cooper, who has starred in films such as 'American Sniper', 'A Star Is Born', and the 'Hangover' franchise, explained: "Love equals discipline. If I love something, I can have the discipline.  "I have a crazy work ethic. That is definitely true. So much so that the jobs that I have taken in the last five or six years, the people that I've worked with, I have said, 'I work really hard, and this isn't going to be easy. And it's because I love it so much."