Infernal Affairs

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Infernal Affairs
Theatrical release poster
Traditional Chinese	無間道
Simplified Chinese	无间道
Directed by	Andrew Lau Alan Mak
Written by	Alan Mak Felix Chong
Produced by	Andrew Lau
Starring	Andy Lau Tony Leung Anthony Wong Eric Tsang Sammi Cheng Kelly Chen Chapman To Gordon Lam
Cinematography	Andrew Lau Lai Yiu-fai
Edited by	Danny Pang Curran Pang
Music by	Chan Kwong-wing
Production companies	Media Asia Films Basic Pictures
Distributed by	Media Asia Distribution
Release date	12 December 2002 (2002-12-12)
Running time	101 minutes
Country	Hong Kong
Languages	Cantonese Mandarin
Budget	US$6.4 million[1]
Box office	HK$55.1 million

Infernal Affairs is a 2002 Hong Kong action thriller film^[2] directed by Andrew Lau and Alan Mak, from a screenplay written by Mak and Felix Chong. The film stars Andy Lau, Tony Leung, Anthony Wong, Eric Tsang, Sammi Cheng and Kelly Chen. The film follows an undercover Hong Kong Police Force officer who infiltrates a Triad, and another officer who is secretly a spy for the same Triad. It is the first in the Infernal Affairs series and is followed by Infernal Affairs II and Infernal Affairs III.

The film was selected as the Hong Kong entry for the Best Foreign Language Film at the 76th Academy Awards but was not nominated. Miramax Films acquired the United States distribution rights and gave it a limited US theatrical release in 2004. Martin Scorsese remade the film in 2006 as The Departed, which won the Academy Award for Best Picture as well as Academy Award for Best Director, Scorsese's first and only Oscar in his career, and Best Adapted Screenplay.^{[citation needed]}

A 4K remaster of the Infernal Affairs trilogy was released on 12 December 2022, to celebrate the 20th anniversary of Infernal Affairs.^{[citation needed]}