The female leads in writer/director Joseph Kosinski’s Untitled Tom Cruise Project have changed almost as often as the film’s title (which has previously been referred to as Horizons and Oblivion). Last year we reported that a number of actresses were vying for two lead roles opposite Tom Cruise in the sci-fi pic. Then, it seemed as if Jessica Chastain (The Help) had landed one of them with the other role still being sorted out. Now it seems that Chastain has backed out in order to work on the Kathryn Bigelow picture about the death of Osama Bin Laden. That left the door open for Olga Kurylenko (Quantum of Solace), who previously auditioned and relative newcomer to American cinema, Andrea Riseborough (Happy-Go-Lucky) to join Cruise.The film, whatever its name is, revolves around Cruise who plays a veteran soldier banished to the surface of Earth which has been destroyed by an alien attack. When a mysterious woman crash-lands nearby, their encounter sets off an eye-opening chain of events. Hit the jump for more.Variety broke olga-kurylenko-bondthe story of Kurylenko’s and Riseborough’s addition to the cast, but HeatVision seems to have more plot details. The plot details differ slightly here as they call the project a:

“love story taking place in an apocalyptic future where most of the population lives in clouds since the Earth is no longer habitable. An Earth-bound repairman whose job it is to work on drones that fight alien life forms meets a woman who forces him to question his world view.”

They are also reporting that Kurylenko will play Cruise’s lover and partner who acts as an anchor to the city in the clouds while he performs his repair work on the surface below. Riseborough will apparently play the crash-landed stranger who sways Cruise’s character away from his lover. (No offense to Riseborough, but I would have swapped those roles.)

The script, with drafts by William Monahan (The Departed) and Karl Gajdusek (Trespass) is being rewritten by Michael Arndt (Little Miss Sunshine). Production is scheduled to begin this quarter.