Brad Pitt is stepping in for Matt Damon in director Darren Aronofsky's boxing movie THE FIGHTER, co-starring Mark Wahlberg. Scott Silver, who wrote 8 MILE, is finishing the script. Based on the true story of Boston boxer "Irish" Mickey Ward, Wahlberg is set to play Ward, with Pitt playing his troublesd half-brother.
Aronofsky last directed the extremely personal head-trip flick THE FOUNTAIN. This sounds much more overtly commercial and an interesting movie for Aronofsky to make at his point in his career.