“True Blood” already has its vampire queen, thanks to Evan Rachel Wood. And now, the hit HBO supernatural series has crowned a new king.

Actor Denis O’Hare, 47, will join the cast for Season 3 as the vampire king of Mississippi.

O’Hare’s character will make his first appearance early in the upcoming season and will stay on as a series regular.

A Tony winner for his role of Mason Marzac in “Take Me Out,” O’Hare’s acting credits also include the films “Duplicity,” “The Proposal,” “Milk” and “A Mighty Heart.”

His TV resume includes appearances “CSI,” the “Law & Order” franchise and a recurring role on ABC’s “Brothers & Sisters” as Travis March.

Season 3 of “True Blood” is slated to bow in Summer 2010.