Stacy Keach has been tapped to co-star in the Fox drama pilot "Prison Break," directed by Brett Ratner. The pilot, from 20th Century Fox TV, studio-based Adelstein-Parouse Prods. and Original TV, centers on an engineer (Wentworth Miller) who inserts himself into a prison he designed to help his brother (Dominic Purcell), a death row inmate who insists he is innocent, escape. Keach plays a warden at the prison. Paul Scheuring, who penned the pilot, and Ratner are executive producing "Prison Break" with Dawn Parouse, Marty Adelstein and Neal Moritz. Keach won a Golden Globe in 1989 for his title role in the miniseries "Hemingway," which also earned the actor an Emmy nomination. He is best known for playing hard-boiled private eye Mike Hammer in a series of TV movies, a primetime series on CBS and a syndicated series. His credits also include the Fox comedy "Titus" and the feature "American History X." Keach is repped by Diverse Talent Group and manager Chuck Binder.