If you lusted after him on the Calvin Klein ads or fancied the bloke Kiera Knightley used to knock about with, then turns out you were onto something given how far her has come from his modelling days.
So to celebrate his birthday today, he's four of his hottest (topless) looks for you to bookmark, drool over, save as your screensaver, whatever really.
For the straight men among you, you can emulate Jamie's winning style below with our product picks. You never know, one day we could be writing this way about you... ;)
Photo Credit: Tumblr
Video Credit: Universal Pictures
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