Emerson College grad Jillian Preger DeFrehn and her dad, Michael Preger, a principle at Preger Entertainment, walked the red carpet together at the premiere of “Vampire Academy” in Los Angeles this week. DeFrehn coproduced the teen vamp movie and, more importantly, runs the Twitter account for its fans. The movie comes out for the rest of us on Friday.Mark Shanahan can be reached at firstname.lastname@example.org. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at email@example.com. Follow her on Twitter @MeredithGoldste.