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'Star Wars Rebels' recruits 'Buffy' star Sarah Michelle Gellar

If the "Buffy the Vampire Slayer" star is now part of the "Star Wars Rebels," cast does that mean she'll be slaying vampire Sith Lords with a light saber? Fingers crossed!

Even Darth Vader can't intimidate a vampire slayer like Sarah Michelle Gellar. 20th Century Fox Television

Disney XD and Lucasfilm's animated series "Star Wars Rebels" just gets better and better. Taking place between "Revenge of the Sith" and "A New Hope," the series explores what happens to various new and old characters post Order 66.

Fans are treated to new characters, as well as a look at Lando Calrissian before he betrayed Han Solo, and at Darth Vader long before started building that Death Star.

And in the Season 1 finale this week, fans not only got to see Darth Vader, but also a beloved character from "The Clone Wars" animated series, which Disney cancelled before the debut of "Star Wars Rebels."

We already know that one of the main characters of "Star Wars Rebels" -- Kanan -- is voiced by Freddie Prinze Jr., but now his wife and "Buffy the Vampire Slayer" star Sarah Michelle Gellar has joined the cast as well.

Gellar posted a photo of herself and "Star Wars Rebels" executive producer Dave Filoni in the recording studio on her Instagram account Tuesday with the caption, "Anyone want to guess..." -- which of course sent fans in a frenzy of wild speculation over what character she could be playing.

While I'm hoping for a Jedi Vampire Slayer, other fans chimed in the Instagram photo comments with hopes for a young Princess Leia.

"We're thrilled to have Sarah Michelle Gellar on board for season two," Filoni told the Hollywood Reporter. "She is a true 'Star Wars Rebels' fan and her passion undoubtedly comes through in the voice recording sessions."

Even though we won't see if Gellar swaps her wooden stake for a light saber until Season 2 of "Star Wars Rebels," US fans can catch the animated series on Disney XD every Monday at 9 p.m. local time. (UK and Australian fans, check your local Disney XD website for the time and date of the episode.)

We can't wait to see which character Sarah Michelle Gellar will voice in Season 2 of "Star Wars Rebels." Sarah Michelle Gellar/Instagram