The Vampire Diaries has founds it Greta.
Former American Idol contestant Lisa Tucker, who finished 10th on season five, will debut next month as Luka's sister, the young witch Klaus has been reportedly holding hostage.
Greta will first show up on April 21, the same installment during which we'll meet Joseph Morgan as Klaus. Her magical character is described as "cool, hip, smart," and "a bit of a thrill-seeker."
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