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Knock Knock is a 2015 American erotic horror thriller film directed by Eli Roth, who also co-wrote the script with Guillermo Amoedo and Nicolás López. The film stars Keanu Reeves, Lorenza Izzo, and Ana de Armas. The film was released on October 9, 2015, by Lionsgate Premiere, and it is a remake of Peter Traynor's 1977 film Death Game.