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Hold onto your fangs, The Vampire Diaries and The Originals fans, because we've got some major crossover scoop guaranteed to make you freak out!

Our Kristin Dos Santos sat down with one of the busiest and most kickass showrunners in the biz, Julie Plec, aka the lady who's brought us some of our favorite couples in pop culture, and she had some awesome scoop to share with us about which TVD star is swapping shows for an episode on The Originals this season and why.

And we're not exaggerating when we say that it's as amazing as you could ever hope for.

Watch our interview with Plec above now to find out who's crossing over!

Who's ready for yet another impressive role from doppelganger expert Nina Dobrev?

That's right, the TVD star is about to show off her acting chops once more by introducing another doppelganger via flashbacks to the TVD/Originals universe.

"There's a lot of people that could cross over, and when we plan our crossovers, we like to think of the most clever way to integrate The Vampire Diaries mythology into The Originals mythology," Plec tells us. "There was a character's name introduced a long time ago in season three in association with Klaus [Joseph Morgan] and Elijah [Daniel Gillies] and how they became vampires and a girl that they both loved a long time ago who was the original doppelgänger, Tatia. So Nina Dobrev will be visiting The Originals for a nice little storyline in our fifth episode which airs November 3."

Nina Dobrev, Vampire Diaries

CW

Plec teases that Tatia's presence will bring out a side to the Original brothers that fans have seen them struggle with time and time again: falling in love with the same woman. "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]," Plec says. "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."

So why introduce Tatia on The Originals now, three seasons after her name was mentioned on TVD? "We made a rule at the very beginning, like, ‘Let's not be number whores or number grabbers,'" Plec explains. "We don't want to be doing crossovers for the sake of, ‘Look at us!' You know? But in this particular case, 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."

Are you as excited as we are to see Dobrev pull off yet another doppelgänger, this time in a deadly love triangle between Klaus and Elijah? Clear your schedules now, because Dobrev's episode of The Originals airs Monday, Nov. 3, at 8 p.m.

Joseph Morgan, Candice Accola, Michael Trevino, Vampire Diaries

Justin Stephens/The CW

We can't wait to see how this latest crossover episode stacks up against all the other, epic ones.

For those who don't obsessively re-watch all the crossover episodes as much as possible (just us?), the first crossover episode was the birth of The Originals, when the backdoor pilot for the spinoff series aired as an episode of TVD in late season four. The first official crossover came in November of last year, when TVD star Michael Trevino brought his character Tyler to The Originals to finally get his revenge on Klaus for being the reason he had to end his relationship with Caroline (it didn't go well for Tyler). Then, the Original siblings Klaus and Rebekah (and even a hallucination of Elijah) crossed over for the 100th episode of TVD last season to say goodbye to Katherine (and hook up with Caroline and Matt!).

So basically no matter what happens when Dobrev shows up on The Originals, it's pretty much guaranteed to be an episode that inspires a thousand GIFs.

The Vampire Diaries season six premieres Thursday, Oct. 2, at 8 p.m. and The Originals season two premieres Monday, Oct. 6, at 8 p.m. on the CW.

Watch E! News tonight to see what else Plec had to say about the huge crossover!