The Justice League, also called the Justice League of America or JLA, is a fictional superhero team that appears in comic books published by DC Comics. Various comic book series featuring the League have remained generally popular with fans since inception and in most incarnations, its roster includes DC's most popular characters. The League concept has also been adapted into various other entertainment media, including the classic Saturday morning Super Friends animated series (1973–1986), an unproduced Justice League of America live-action series, and most recently the animated series Justice League (2001–2004) and Justice League Unlimited (2004–2006).