WB is currently playing the trailer in front of "Inception."
Jeremy Renner ("The Hurt Locker"), Jon Hamm and Blake Lively also star in the film, which is based on Chuck Hogan's novel "Prince of Thieves."
"The Town" marks Affleck's second directorial effort; his first was 2007's "Gone Baby Gone."
Graham King produced the pic under his GK Films banner.
Warner Bros. opens "The Town" nationwide on September 17, 2010.