The Irish Mob

Martin Scorsese's 2002 film Gangs of New York, starring Cameron Diaz (left), Daniel Day-Lewis (right), and Leonardo DiCaprio, follows the gang activities of Irish immigrants in 19th century New York.

Also in this category: "Angels with Dirty Faces" (1938), "I Went Down" (1997), "The General" (1998), "The Departed" (2006), and "In Bruges" (2008).