Ramsay (“We Need to Talk About Kevin”) had been attached to “Jane” since the project was first shopped at the Cannes Film Festival last May. But she departed just before shooting was to start on Tuesday in New Mexico.
“Gun,” penned by Brian Duffield, stars Natalie Portman as a woman who asks an ex-lover for help in order to save her outlaw husband from a gang out to kill him. Joel Edgerton plays the ex-lover while Law was to play the leader of the gang.
Michael Fassbender had been set to play the ex-lover role but left the project several weeks ago.
O’Connor’s directing credits include “Pride and Glory” and the pilot of Showtime’s “The Americans.”
The hiring of O’Connor was first reported by Deadline.com.
The director is represented by CAA.