Set in the 1960s, the dark, twisted film -- reviled by some at the Cannes Film Festival -- stars Efron and Matthew McConaughey as two brothers investigating the case of a death row inmate played by John Cusack. Kidman, 45, plays a trashy, bleach-blonde woman obsessed with marrying Cusack -- who seduces Efron in the process of the flick.
In one scene from the breathless clip, Kidman has stripped down to a black bra and underwear as she straddles a topless Efron (wearing boxers) in bed. Another much talked-about scene features Kidman dancing in the rain with Efron -- who's wearin gjust tighty-whities.
"I've been looking as an actor for something raw and more dangerous in terms of performances, and then this came along," Kidman has said of the role.
Efron was just as stoked to stretch the limits of his craft -- particularly alongside Kidman. "I have been in love with her for a long time, since Moulin Rouge. It was the best opportunity in the world for me, and I loved every moment."