The 35-year-old 'Need for Speed' actor says he feels better in casual clothes when he is not working, reported Contactmusic.
"I love anything vintage, a good quality suit, scruffy jeans and my trusty leather army boots. I like being casual. As an actor, I'm in costume all the time. That's why fancy dress parties are my idea of hell," Cooper said.
Cooper takes special interest when it comes to fashion and emerging designers.
"I can't believe how easily fads come back into style, like skinny jeans. But I've always loved fashion. It influences generations and resonates with a moment in time. I love seeing what designers come up with, especially young designers. I think they're artists," he added.