According to reports Nia Long and Taraji P. Henson did NOT get along on the set of Empire...
Multiple production sources tell TMZ, Nia was extremely rude to the people in hair, makeup and wardrobe -- something Nia's people strongly deny -- which pissed Taraji off something fierce.
We're told it got to the point they stopped speaking to each other when they were on set. Our sources say it was next to impossible to film the scenes they did together, and that's why they had actually blocked out how to shoot those scenes separately.
As for whether Nia will be back for season 4, our sources say no way in hell.