According to The Hollywood Reporter, which reports on things from Hollywood, "principal photography has started in Toronto on Troy Duffy's sequel to the 2000 indie." Yes, Norman Reedus and Sean Patrick Flanery are coming back to reprise their roles. Also back on board are Billy Connolly and David Della Rocco. Other cast members will include Clifton Collins, Julie Benz, and Bob Marley. (Hey, that's what it says.)
Notably missing from the sequel report is the participation of Harvey Weinstein, who famously set Troy Duffy up with a sweet deal and then gave the first-timer just enough rope to hang himself with. (For more on the original Boondock back-story, we turn to the lord Wiki.) Producer Chris Brinker has this to say about the project: ""We expect this film to be a truly intense, humorous and satisfying film for all those who have looked forward to the sequel for so long." Which make sense since those folks are the only ones who'll go see it.