Anna Friel joining Bradley Cooper thriller

Anna Friel is in negotiations to join the cast of Dark Fields.

The story centers on a down-and-out writer (Bradley Cooper) who gets his hands on a top-secret pharmaceutical drug that makes one smarter. He experiences sudden financial and social success but soon discovers that the drug has lethal and lasting side effects, including “trip-switching,” a phenomenon in which time moves with a stop-motion quality. Before long, mysterious antagonists are pursuing him.

Friel will play Cooper’s ex-wife, a woman who was a go-getter before their breakup.

Robert De Niro and Abbie Cornish already are cast in the movie.