Look who'll be playing Eric Northman's vampire sister on True Blood

Everyone's favorite tall, blond and undead viking vampire sheriff, Eric Northman (Alexander Skarsgard) is getting a sister on the next season of HBO's hit series True Blood. Wanna guess who the lucky lady is? Hint: She's a former Robin Hood star.

The news just broke over at Mike Ausiello's TV Line that Lucy Griffiths (who played a kick-ass Xena-esque Maid Marian on the BBC drama Robin Hood) nabbed the very important role of Eric's little vamp sister Nora:

Griffiths will play Nora, Eric's (Alexander Skarsgard) centuries-old vampire "sister" (they were both progenies of Godric) who is working as a double agent within the Vampire Authority. Described as intelligent, intimidating, cool under pressure and a very good liar, Nora loves Eric deeply, but has dedicated her life to a higher purpose.

Lara Pulver, who played Sookie Stackhouse's (Anna Paquin) fairy godmother Claudine (God rest her fairy soul), is the other Robin Hood alum. She played Isabella in the third and last season of the BBC series.

As Maid Marian, Griffiths sent both Robin (Jonas Armstrong) and Guy of Gisborne's (Richard Armitage) hearts aflutter for two seasons in the medieval action-drama U.K. series. Question is, will she get to do the same to Eric, or perhaps to one of our other Bon Temps favorites?

Much like Jessica (Deborah Ann Woll) and Godric (Allan Hyde) before her, Nora is also a character purely created for the HBO TV show, since none of them exist in author Charlaine Harris' popular Sookie Stackhouse book series.

We're also thinking Nora's the certain someone in high places who's been protecting Eric for a while. You know, the one Nan Flanagan (Jessica Tuck) mentioned to King Bill (Stephen Moyer)? We're taking bets right now.

So what do you think of this casting news? Do you have high hopes for the character?

True Blood season five will return in the summer of 2012 on HBO. In the meanwhile, waiting will still most definitely suck.

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