UPDATE: Bradley Cooper to Replace Jude Law in Troubled 'Jane Got a Gun' Production

UPDATE: Bradley Cooper has signed on to replace Jude Law in troubled Western production "Jane Got a Gun."

EARLIER: Details are beginning to surface from the Lynne Ramsay drop-out debacle surrounding troubled Western production "Jane Got a Gun." Sources who spoke to the Hollywood Reporter say that Ramsay had not been presented with an approved shooting schedule, budget and script just days before the film was set to begin, while others claim that the Scottish-born director failed to deliver a script amid increasingly strange behavior. CAA scrambled to replace the director with Gavin O'Connor.

Reportedly an impasse surrounding Ramsay's right for final cut -- if she went over-budget, her final cut would be revoked -- resulted in her drop-out on Saturday morning, and no-show at the production start on Monday. More details here, with the LA Times' sources in accordance with THR's.

Meanwhile, Ramsay's departure was kept secret from star Natalie Portman, who had enlisted the stylish director to take on the project in the first place.

EARLIER: News broke on March 19 that Lynne Ramsay ("We Need to Talk About Kevin") had not shown up to the first day of production on "Jane Got a Gun," a Western starring Natalie Portman and Joel Edgerton. In the wake of this abrupt no-show, "Warrior" director Gavin O' Connor is in final talks to take over the helming reins, and will reportedly begin directing on March 21.

O'Connor would be a good save, as he's a superb actors' director. The trick here is to hang on to the cast; O'Connor worked with Edgerton on the under-appreciated "Warrior," with Tom Hardy. Jude Law, who signed up to work with Ramsay and replace departed Michael Fassbender, is also out. So that casting hole still needs to be filled.

Producer and financier Scott Steindorff told Deadline that he was determined to find a new director to keep the project, which had 150 crew members in place and ready to shoot, from falling apart: 

"I have millions of dollars invested, we’re ready to shoot, we have a great script, crew and cast. I’m shocked and so disappointed someone would do this to 150 crew members who devoted so much time, energy, commitment and loyalty to a project, and then have the director not show up. It is insane somebody would do this to other people. I feel more for the crew and their families, but we are keeping the show going on, directors are flying in, and a replacement is imminent.”

No word yet on the reasons for Ramsay's quitting, but the suddenness of her departure, and Fassbender's decamping before her, indicates a troubled production. Details are likely to surface soon.