Jamie Dornan has spoken about playing Christian Grey in the forthcoming Fifty Shades of Grey flick, revealing that he has "no idea" whether the movie will change his life.

Speaking of the film on The Graham Norton Show, Dornan was asked what he thinks the aftermath will be like once Fifty Shades hits cinemas on Valentine's Day 2015.

The hunky actor replied: "I mean, look, we're in a really powerful position that 90-plus million people have read the book so if like a third—I mean, a hundredth of those people—that's successful if they go see the film.

"It's a nice position to be in, but I have no idea what it's gonna do."

He went on to explain that the movie has already changed his life in a way he'd never thought was possible, admitting: "So basically, I've always had a complex with the way I walk.

"I've not always been told I've got a bad walk, but someone's always commented on my walk. It's always been a bit like, 'All right. That's how you walk?'"

The 31-year old then claimed that when he had to prepare for a dance scene with Dakota Johnson - who plays Anastasia Steele - he was able to figure out the proper way to walk when his instructor told him heel-to-toe.

"No one ever told me that!" he exclaimed. "I was always toe-to-more-toe! Now I just apply that every day, when I'm walking around."