P2 is a 2007 American psychological horror film directed by Franck Khalfoun, in his directorial debut, co-written by Khalfoun and producers Alexandre Aja and Grégory Levasseur, and starring Rachel Nichols and Wes Bentley. Its plot follows a young businesswoman who becomes trapped in an underground parking garage in midtown Manhattan on Christmas Eve, where she is pursued by a socially awkward, psychopathic security guard who is obsessed with her.

Following the release of their film High Tension (2003), Aja and his co-writer on that film, Levasseur, developed the screenplay for P2 alongside Khalfoun, inspired by a series of real-life attacks on women that were reported in Paris parking garages. Filming began in late-2006 in Toronto, with the majority of the shoot taking place in a real, operating parking garage.

P2 was released theatrically in the United States in November 2007, and was the first feature film distributed by Summit Entertainment. The film was a critical and commercial failure, averaging less than $1,000 per cinema during its opening weekend. The film went on to gross $7.7 million internationally. Rotten Tomatoes describes it as "full of gore, but low on suspense".