Since appearing on Downton Abbey in 2010, Rose Leslie's career has seen some pretty serious upward momentum. She played Ygritte (a.k.a. the Wildling famous for telling Jon Snow how little he knows) in Game of Thrones, Young Milner in one of the greatest TV shows of all time, Utopia, and she's set to appear in season 4 of Luther alongside star Idris Elba.

This weekend, however, she stars as a good witch named Chloe in The Last Witch Hunter, where she teams up with Vin Diesel to stop all the bad witches from destroying the world.

Recently, we had the opportunity to interview Rose about her role in The Last Witch Hunter, Luther season 4, and more.

Screen Rant: You’ve had such an impressive career trajectory, from Downton Abbey to Game of Thrones to The Last Witch Hunter. What was it like to transition to such a big blockbuster type film?

Rose Leslie: It was an education, I think, to be a part of a studio movie of this scale was certainly kind of eye-opening for me. But I do feel that - when we're talking about 'Game of Thrones,' I think that the amount of quality that goes into a show like that, like the cinematography and the directors and the cast and the locations, it's very much on par with movies. And I think that that kind of transition from television to screen is now getting smaller and smaller.

SR: Sure, yeah. How did you prepare for this role? Did you watch a lot of witch movies? Did you study actual Wiccan history?

RL: [Laughter] I did. I mean I did a little bit of research, certainly kind of like with the Salem witch trials. But with Chloe, the character I play, she's essentially a good witch, she's not necessarily nefarious. She wants to help Kaulder and enable the destruction of the Queen Witch. And so - she's not really hoping to be evil and ...I don't know, spread hate.

SR: I’m ridiculously excited for Luther to return.

RL: So am I.

SR: What can you tell us about your role in the upcoming series?

RL: In the upcoming series of 'Luther,' I play the character of DS Emma Jones, and she is a new member of that policing world, whereby she has now entered into John Luther's office. And, you know, she has to then basically work alongside him, having never really - she's never really too sure - she's dubious of his character. She's certainly heard of things about this infamous Luther, but she kind of figures him out for herself throughout the two episodes.

SR: Excellent, I'm  looking forward to it. Finally, what’s next for you? Do you have any projects lined up after Luther?

RL: I don't, no, not after 'Luther.' Certainly, the next time I'll be on the screen is December on the BBC.

MORE: Elijah Wood Talks The Last Witch Hunter and Broken Age

The modern world holds many secrets, but the most astounding secret of all is that witches still live amongst us; vicious supernatural creatures intent on unleashing the Black Death upon the world. Armies of witch hunters battled the unnatural enemy across the globe for centuries, including KAULDER, a valiant warrior who managed to slay the all-powerful QUEEN WITCH, decimating her followers in the process. In the moments right before her death, the QUEEN curses KAULDER with her own immortality, forever separating him from his beloved wife and daughter in the afterlife. Today KAULDER is the only one of his kind remaining, and has spent centuries hunting down rogue witches, all the while yearning for his long-lost loved ones. However, unbeknownst to KAULDER, the QUEEN WITCH is resurrected and seeks revenge on her killer causing an epic battle that will determine the survival of the human race.

The Last Witch Hunter is directed by Breck Eisner, stars Vin Diesel, Elijah Wood, Rose Leslie, Ólafur Darri Ólafsson, Julie Engelbrecht, and Michael Caine, and is produced by Bernie Goldmann, Mark Canton, Vin Diesel, and Samantha Vincent.

The Last Witch Hunter hits theaters October 23rd, 2015.