Gangs of New York is a 2002 epic historical drama film directed by Martin Scorsese and written by Jay Cocks, Steven Zaillian, and Kenneth Lonergan, based on Herbert Asbury's 1928 book The Gangs of New York. The film stars Leonardo DiCaprio, Daniel Day-Lewis, and Cameron Diaz, along with Jim Broadbent, John C. Reilly, Henry Thomas and Brendan Gleeson in supporting roles. The film also marks the start of a collaboration between DiCaprio and Scorsese.
The film is set from 1862 to 1863, when a long-running Catholic–Protestant feud erupts into violence, just as an Irish immigrant group is protesting the threat of conscription during the Civil War. Scorsese spent 20 years developing the project until Miramax Films acquired it in 1999. Principal photography took place in Cinecittà Studios in Rome, and Long Island City, New York City.