R-rated

The Motion Picture Association of America (MPAA) film rating system is used in the United States and its territories to rate a film's suitability for certain audiences based on its content. The MPAA rating system is a voluntary scheme that is not enforced by law; films can be exhibited without a rating, although many theaters refuse to exhibit non-rated or NC-17 rated films. Non-members of MPAA may also submit films for rating. Other media, such as television programs and video games, is rated by other entities such as the ESRB and the TV Parental Guidelines.

The MPAA rating system is one of various motion picture rating systems that are used to help parents decide what films are appropriate for their children. It is administered by the Classification & Ratings Administration (CARA), an independent division of the MPAA.

Since the late 1990s, the MPAA film ratings have been as follows:

If a film has not been submitted for a rating or is an uncut version of a film that was submitted, the labels Not Rated (NR) or Unrated (UR) are often used. Uncut/extended versions of films that are labeled "Unrated" also contain warnings saying that the uncut version of the film contains content that differs from the theatrical release and may not be suitable for minors.

If a film has not yet been assigned a final rating, the label This Film Is Not Yet Rated is used in trailers and television commercials.

The MPAA also rates film trailers, print advertising, posters, and other media used to promote a film. Green, yellow, or red title cards displayed before the start of a trailer indicate the trailer's rating.

In 1989, Tennessee enacted a law whereby patrons of an R-rated motion picture were not admitted unless they were at least 18 years old or accompanied by a parent or adult guardian.

Jack Valenti, who had become president of the Motion Picture Association of America in May 1966, deemed the Motion Picture Production Code – in place since 1930 and rigorously enforced since 1934 – as out of date and bearing "the odious smell of censorship". Filmmakers were pushing at the boundaries of the Code, and Valenti cited examples such as Who's Afraid of Virginia Woolf?, which contained the expressions "screw" and "hump the hostess"; and Blowup, which was denied Code approval due to nudity, resulting in the MPAA member studio releasing it through a subsidiary. He revised the Code to include the "SMA" (Suggested for Mature Audiences) advisory as a stopgap measure. To accommodate "the irresistible force of creators determined to make 'their films'", and to avoid "the possible intrusion of government into the movie arena", he developed a set of advisory ratings which could be applied after a film was completed. On November 1, 1968, the voluntary MPAA film rating system took effect, with three organizations serving as its monitoring and guiding groups: the MPAA, the National Association of Theater Owners (NATO), and the International Film Importers & Distributors of America (IFIDA).

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