If you were getting sick of seeing Keira Knightley reveling in the world of period pieces, here's a feature for you: Variety reports that both she and Colin Farrell have signed on to star in London Boulevard -- the directorial debut of Departed screenwriter William Monahan. Based on the novel by Ken Bruen (that Monahan nabbed almost a year ago), the film will focus on a criminal in South London (Farrell), who has just finished doing time in prison for assault.