There’s a sexy new brunette on Season 5 of The Vampire Diaries, and her name is Nadia. Played by Olga Fonda, this Eastern European beauty is set to take Mystic Falls by storm. Why is she in town and what might she want? TVD executive producer Julie Plec spoke to Entertainment Weekly about this new and mysterious character.

As we’ve reported before, Matt Donovan (Zach Roerig) and Rebekah Mikaelson (Claire Holt), ahem, met Nadia during their whirlwind tour of Europe (word on the street is there may have been a threesome involved). Apparently, Nadia followed Matt home from their Bohemian tryst. Awkward, right? Well, it seems there’s more to this Czech beauty than casual sexual rendezvouses.

''What she is, is the big mystery,” Julie told EW. “She seems like some single moment that they left behind in their European whirlwind, and when she appears, she indicates that there's more to her than meets the eye. Between her and Silas, we definitely have our hands full in Mystic Falls of people causing trouble.''

Yikes! It sounds like Nadia might be bad news if Julie is comparing her to bad guy Silas. Matt should be more careful about whom he engages in threesomes. Perhaps our favorite blue-eyed busboy will make up for the faux pas, though.

Julie also revealed: ''People should be looking forward to everything with Matt [this season], we just can't say anything about it. Matt's got a good story line this year. It begins with a steamy, sexy tryst in Prague, and just goes from there. Our little Matty boy had a good summer.'' You had us at “steamy, sexy tryst,” Julie.

What do you think Nadia is doing in Mystic Falls? Share your theories in the comments below!