"Burt" sez:

"Keanu Reeves is rad. Yeah, people say his a bad actor, POINT BREAK sucked, "I am an FBI agent..." blah, blah, blah ... and I am tired of it. Got booked to work this 5:30pm to 5:30am movie on a rush call and I had know idea I was stepping into Reeve's next MATRIX-like blockbuster. This film is about a guy who fights demon's or something, but I was mostly impressed by Keanu's work ethic. No entourage, no hullabaloo, no BS. He gets dropped off in an SUV, and he works. He doesn't have people bringing him his food, or smoking his cigarettes for him. He is there in every sense of the word. In fact, he was working in a scene THAT HE WASN'T EVEN IN. Rachel Weisz needed an eyeline, and rather then have someone else do it, Keanu stood BEHIND the camera so she could actually look at him for the shot. He didn't do this once or twice, he did it like fifteen times. And when one of the extra's was given a line, Keanu and Co. were very cordial to him. And best of all, I think the beautiful Rachel Weisz gave me the eye a few times but I can't be sure.

I spent a decent amount of time on this shoot in my car (I keep getting booked with it) talking on the phone to various people."

That sounds like our guy.

-from movieweb, via the hellforums, thanks duda!