Reign of Assassins is a 2010 wuxia film directed by Su Chao-pin and co-directed by John Woo. The film is shot in China and set during the Ming Dynasty. The film stars Michelle Yeoh, who plays an assassin who tries to return to a normal life after being counseled by a monk. After saving her husband and herself from robbers, she attracts the attention of her former assassin gang.

The film began production on October 30 and was shot in China and Taiwan. While shooting, John Woo was on set continually advising director Su Chao-pin, which led to Woo being credited as a co-director. On September 3, 2010, Reign of Assassins had its premiere at the 67th annual Venice Film Festival, where it met acclaim from critics. It premiered in China on September 28, 2010, and was purchased by The Weinstein Company for North American release rights and by Lionsgate for United Kingdom release rights.