Get ready for a blood-sucking good time!

After weeks of speculation, Law and Order: Special Victims Unit alum Chris Meloni has officially inked a deal to appear as a series regular on True Blood's fifth season.

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Producer Alan Ball tells his new star, 50, will play "an ancient, powerful vampire who holds the fate of Bill and Eric in his hands."

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Meloni's True Blood appointment marks his return to the small screen, just months after suddenly departing SVU after 12 seasons.

Though additional details about Meloni's character have yet to be revealed, the actor will fit in well should he have to sex it up alongside stars Anna Paquin and Stephen Moyer. Meloni often dropped trou during his stint on HBO's prison drama Oz, where he played bisexual inmate Chris Keller.

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