Character He Plays: Frank Costello
Best Line: "I'm an ahtist. You give me a fuckin' tuber, I'll get you somethin' aht of it."
Boston Guy's Assessment: He did a good job not overdoing it—the accent felt pretty natural. Anyone can drop an R, but knowing when to add one is what makes you a real Bostonian.

See, I had always figured that Nicholson had one of the worst Boston accents in The Departed. I thought it was just a hodge-podge of noises tossed together. But that's why he's one of the best actors ever. While most everyone on this cast was reinforcing stereotypes with their Boston accents, Nicholson was teaching you that there's more to the accent than you could even imagine. Take a bow, Jack Nicholson:

Jack Nicholson