Nicole Kidman and Brad Pitt are in negotiations to star in Regency Enterprises' action-adventure feature "Mr. and Mrs. Smith" for director Doug Liman. There is no start date. The project is an original screenplay written by Simon Kinberg and is described as "The War of the Roses" meets "True Lies." It is about a bored married couple who discover they are enemy assassins hired to kill each other. Oscar-winning screenwriter Akiva Goldsman is producing through his Weed Road Pictures alongside Summit Entertainment topper Patrick Wachsberger. Overseeing the project at Regency is executive vp Peter Cramer for production topper Sanford Panitch. Kidman and Pitt are repped by CAA. Kidman, additionally repped by Handprint Entertainment, is in production on Fine Line Features' "Birth" and will follow with Paramount Pictures' "The Stepford Wives." Pitt, additionally repped by Brillstein-Grey Entertainment, will begin shooting Warner Bros. Pictures/Village Road Show Pictures' "Troy" in April.