Entourage (film) was a film adaptation of a comic.
Self-contained graphic novels, and miniseries many of which do not feature superheroes, can be adapted more directly, such as in the case of Road to Perdition (2002) or V for Vendetta (2006)
  Some British films and British/American collaborations that were based on successful British plays include Gaslight (1940), Blithe Spirit (1945), Rope (1948), Look Back in Anger (1959), Oh! What a Lovely War (1969), Sleuth (1972), The Rocky Horror Picture Show (1975), Shirley Valentine (1989), The Madness of King George (1994), The History Boys (2006),  Quartet (2012), and The Lady in the Van (2015)

