Most appearances by a movie in other movies

The film that appears most often in other films – playing on a TV in the background of a scene, for example – is Night of the Living Dead (USA, 1968). As of 16 January 2024, there were 129 movies logged on IMDb that include snippets of George Romero's zombie classic.

Due to an administrative error, this legendary indie horror movie was never properly registered with the US copyright office, and therefore entered the public domain on release. Because of this, filmmakers can show sections of the film on screen without having to pay royalties or get permission.