50 Cent is set to portray a drug dealer in the upcoming flick “Righteous Kill,” co-starring Academy Award-winning screen legends Al Pacino and Robert De Niro.

“I’m not even sure they know yet,” 50 said at Tuesday’s launch of his G-Unit showroom on W. 23rd St. “Me and Robert were supposed to shoot a film where I played a police officer, but now Al and Robert play the cops.”