True Blood star Lucy Griffiths, who portrays Liv in the Constantine Pilot for NBC, and who was set to be one of that series' main cast members, has left this show based on the DC Comics title Hellblazer.

Liv, an original character created for the NBC series, will be written out of Constantine and replaced with a character from the source material. The change was made after the show's creators decided they wanted to move in a different direction creatively.

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Constantine centers on master of the occult John Constantine (Matt Ryan), who struggles with his faith as he is haunted by the sins of his past. He must defend humanity from the gathering forces of darkness in this one hour drama series. Liv was set to be the female lead, and in the pilot she must team-up with John after she is marked for death by a powerful demon. She is able to see the supernatural world among us, and becomes a key player in the battle between good and evil.

NBC has decided not to recast Liv, but instead will bring in Zed, a foil from the original comic books who eventually becomes John's right-hand woman. She will appear early on in the first season, while additional characters from the Hellblazer comics are also being added in later during this inaugural set of episodes. Zed is set to be the first character to appear from the existing DC Comics universe aside from the other main characters appearing in the pilot.

Constantine airs Fridays at 10 p.m. starting Oct. 24 on NBC.