The Fifty Shades of Grey hunk recently topped Heat magazine's annual survey and was stunned when he heard the news.
His father Jim said: ''I sent Jamie the Hottest Hunks copy to South Africa where he's filming. Winning these sort of things doesn't mean an awful lot to Jamie, but I knew he'd be pleased. When I called him he told me, 'There must be some kind of mistake.' But that's his usual modest self-effacement coming through.''
The 33-year-old actor is currently shooting Jadotville and also has series three of The Fall and the Fifty Shades follow-up, Fifty Shades Darker, in the pipeline, so his dad hopes he gets some time off soon.
He told Heat magazine: ''I hope Jamie will get a break at the end of this summer, they all work so much. He's out in South Africa for a couple of months, so we've not spoken about Fifty Shades Darker. As for The Fall, Jamie got really into the part. The first time he was over in Belfast filming, I think I only saw him about twice in six months because he really did lock himself away to get into the role. I watched the first two series and they were really good, but I haven't a clue what happens next.''