Melissa Rosenberg is a television writer and producer, and the screenwriter behind the enormously successful "Twilight" teen-vampire movie series phenomenon. Rosenberg began her career writing for TV in the early '90s, eventually contributing to such shows as the westerns "Dr. Quinn, Medicine Woman" and "The Magnificent Seven," on which she also co-produced. By 2003, Rosenberg had become a co-executive producer, as well as infrequent writer, on the teen-centric drama "The O.C.," targeting a demographic that served her well later. Her writing first hit the screen in 2006, with the street-dancing drama "Step Up," which starred teen heartthrob Channing Tatum in an early lead role. That same year, Rosenberg became a writer and producer for Showtime's crime mystery "Dexter," with Michael C. Hall playing the serial killer vigilante title character. Rosenberg and her fellow "Dexter" producers were awarded several Writers Guild and Emmy Award nominations for best drama. In 2008, a crucial few powers-that-be at Summit Entertainment, the production company that made "Step Up," offered Rosenberg the opportunity to adapt Stephenie Meyer's popular "Twilight" novel, and she not only accepted, but she--along with Summit's marketers, apparently--hit it out of the park: the romantic fantasy, which starred Kristen Stewart and Britain's Robert Pattinson, was a runaway box office hit, earning nearly $200 million domestically on a relatively modest budget. Rosenberg was off to the screenwriting races, going on to pen the sequels "New Moon," which was released in 2009; "Eclipse" in 2010; and the two part"The Twilight Saga: Breaking Dawn."