The CW Network

"What we remember from The Vampire Diaries, for those who watch both shows, is that [Klaus and Elijah] both loved her, so it's a little bit of history repeating itself like with Stefan [Paul Wesley] and Damon [Ian Somerhalder]," creator Julie Plec says of Tatia's highly anticipated debut. "And then Esther [Alice Evans], their mother, killed her so that she could make Klaus not a hybrid. There's lots of secrets and scandal and romance and terrible tragedy attached to her character. We'll get to go back into the past to see how that all played out."

Dobrev is only the second TVD star to appear on The Originals, with Michael Trevino guest staring as Tyler in season one. As for why it was time to stage another crossover, Plec told us, "The character of Tatia is part of their history and is kind of a dangling chad. It's something we brought up a long time ago and never paid off."