Constantine Official Site:The official site for the film includes cast and story information as well as multimedia.
Box Office Mojo: Constantine: Details about the film's numbers, facts, and figures.
Enterviews: Constantine: Review of Keanu Reeves' latest comic book adaptation.
FilmForce: Constantine: A database of information, news, and interviews.
Future Movies: Constantine: Detailed review from comic book fan including photographs.
IMDb: Constantine: Cast, crew, production information, and links.
Mooviees! - Constantine (2005): Features photos, wallpapers, trailers, review links, cast overview, synopsis and production notes.
Rotten Tomatoes: Constantine: Critical reviews, information, production notes, trailers, and images.
The Celebrity Cafe Review: Bobby Blades assesses the comic book adaption to the silver screen.