John Constantine is a fictional character.
Hellblazer ( also known as John Constantine , Hellblazer ) is an American contemporary horror comic book series , originally published by DC Comics , and subsequently by the Vertigo imprint since March 1993 when the imprint was introduced . John Constantine ( [ ˈkɒnstəntaɪn ] ) is a fictional antihero , appearing in comic books published by DC Comics and the DC Comics imprint Vertigo . The Hellblazer series was the longest-running and most successful title of DC 's Vertigo imprint .