Kill the Irishman (alternatively known as Bulletproof Gangster) is a 2011 American biographical crime film directed by Jonathan Hensleigh, and starring Ray Stevenson, Vincent D'Onofrio, Christopher Walken, and Val Kilmer. Written by Hensleigh (along with Jeremy Walters), it is based on the life of Irish-American gangster Danny Greene, and was adapted from the book To Kill the Irishman: The War That Crippled the Mafia by Rick Porrello.