!! OMG, he's naked: Viggo Mortensen !!
I think that Viggo Mortensen is the only man to ever make long hair and a beard look appealing. In his role as Aragorn in Lord of the Rings, it could be that he was hot by comparison to all the hobbits running around, but there was definitely a renegade ruggedness about him that kept everyone swooning.
After the jump, take a look at Viggo in a more cleanly shaven and nude role in the film Indian Runner [NSFW].