Amber Valletta will star in CBS' supernatural drama pilot Twilight, about a private investigator (Alex O'Laughlin) who is a vampire, according to The Hollywood Reporter. Twilight comes from Warner Brothers Television and Silver Pictures.
Valletta will play the P.I.'s immortal love, a vampire who turned him after biting him on their wedding night.
O'Laughlin and Shannon Lucio were cast in the pilot last week. Lucio will play an ambitious TV reporter who becomes close with the vampire.
In other pilot news, ABC's time-travel drama pilot Life on Mars, based on the BBC series, has been pushed back because of difficulties casting the lead. The David E. Kelley Productions and 20th TV drama is now being targeted for midseason.