It seems that an upcoming production has switched out its lead actor. According to The Hollywood Reporter, Bradley Cooper is set to star in Dark Fields, in a role that Shia LaBeouf was originally attached to.

Neil Burger is directing the film, with Leslie Dixon adapting the Alan Glynn book for the screen. The story revolves around a writer (Cooper) who comes across a secret drug that makes people smarter. While he acheives success with the drug, he starts to experience the potentially-lethal side effects, not to mention the men chasing after him for the drug.

No production schedule was released for the film.

Limitless was released March 18th, 2011 and stars Bradley Cooper, Robert De Niro, Abbie Cornish, Andrew Howard, Anna Friel, Johnny Whitworth, Tomas Arana, Robert John Burke. The film is directed by Neil Burger.