"The Originals" may be on a summer hiatus, but the writers behind the hit television series have already begun working on the next chapter of the show.

On Monday, show creator Julie Plec took to Twitter to announce that she and the writers for both "The Originals" and "The Vampire Diares" have started composing the scripts for the upcoming seasons.

"It's back to school day in the @TVDWriters @OGsWriters rooms. And first day of freshman year for @ContainmentRoom!," Plec tweeted at 12:40 p.m. on Monday.

She then followed up with another tweet just before 5:30 a.m. that Tuesday to update fans about her long 18-hour day.

"Somehow my first day of school turned into an 18 hour day. #anditbegins," she wrote.

As for what fans can expect in season 3, executive producer Michael Narducci teased that Davina could be the Mikaelson brothers' biggest nightmare now that she has been appointed as regent of the witches of New Orleans.

"The spirits are going to have access to Davina," he told TVLine. "They're going to lend her their power and communicate with her about what's best for the people and witches of New Orleans. That's who she'll be an advocate for, and the Mikaelsons, some would argue, are not the best things in the world for the witches. That's going to put them at odds, assuming there's no larger threat coming for which they might have to unite against. There are a lot of different ways this could play out."

Series star Daniel Gillies has also revealed that the strained relationship between Elijah and Klaus will set off a chain of events when the vampire drama returns to The CW next fall.

"I think the rift between them is going to precipitate the chain of events," said Gillies, who plays Elijah, during an interview with The Wrap's "Drinking with the Stars."

"It's not just a begrudging alliance now -- it's an alliance on its last thread of trust," he added.

He went on to say that the brothers will not patch up their relationship anytime soon as their bitter conflict is "the fundamental problem of the entire show."