Nicole Kidman is on the verge of dropping out of her starring role in the David Fincher-directed drama The Panic Room due to a bum knee. According to Variety, Mrs. Tom Cruise — who was already two weeks into shooting Panic — never fully recovered from a knee injury she sustained while shooting Moulin Rouge in Australia. Should Kidman exit, producers would need to recast quickly, considering the project has to be completed before the anticipated actor's strike this summer.