Christopher Walken, Ray Stevenson and Val Kilmer Join the Cast of The Irishman Actors Christopher Walken, Ray Stevenson and Val Kilmer have been added to the cast of mob drama The Irishman. The film is based on real-life mobster Danny Greene, a violent Irish-American gangster who competed with the Italian mob in 1970s Cleveland and ended up provoking a countrywide turf war that crippled the Mafia. Stevenson will play Greene. Walken will play the loan shark and nightclub owner Shondor Birns, and Kilmer is cast as a Cleveland police detective who befriends Greene. The film is based on Rick Porrello’s bestseller To Kill The Irishman: The War That Crippled The Mafia. Jonathan Hensleigh, who previously worked with Stevenson on The Punisher, will pen the screenplay and direct.