The Boston-raised BFFs, who won an Oscar for Best Original Screenplay back in 1999 for their film Good Will Hunting, are teaming up once again for an upcoming flick about mobster James "Whitey" Bulger.
"The nice thing about working with Matt, somebody that you've known a long time, is you don't have to worry about how you're going to get along or what the process is going to be like," Affleck gushed to us at last night's Artios Awards in Beverly Hills.
Affleck will direct the flick with Damon playing Bulger, the notorious Massachusetts fugitive who disappeared for 16 years before being caught in Santa Monica in 2011.
"We've developed a pretty good story over the years and we don't lie to each other," Affleck dished. "If it's not good, we say it's not good. And it makes the whole process a lot easier."
Casey Affleck is also set to star as Bulger's politician brother Billy Bulger.
While we'll have to wait and see if Affleck and Damon's next joint project earns them Oscar gold, Affleck says he isn't holding his breath for any awards for his latest flick Argo.
"Honestly, that's something I really try not to think about at all," the 40-year-old actor smiled. "I've had situations where I've allowed it to creep into my mind. It was always just frustrating and disappointing…so I try to just keep my focus."