'Black Mass' trivia and fun facts

Despite filming a substantial amount of scenes as Catherine Greig, Sienna Miller's part was cut for pacing reasons.

The word "fuck" is said 254 times throughout the film.

Johnny Depp said that this is his favorite out of all the films he has done.

This is the second time that Benedict Cumberbatch and Julianne Nicholson star in a movie together. They were previously in 'Agosto' (2013).

Johnny Depp tried multiple times to speak to Whitey Bulger while preparing for the role to which Bulger declined.