Jessica Tuck

True Blood is amping up the girl power for Season 4.

The HBO drama is promoting Jessica Tuck to a series regular and adding three new actresses, Deadline reports.

Tuck, 47, has recurred since the show's inception as vampire Nan Flanagan, the spokeswoman of vampires for the American Vampire League.

True Blood casts Dexter star

The L Word's Janina Gavankar will also join the cast as a new series regular. Gavankar will play Luna, a public school teacher and shapeshifter. The 29-year-old recently appeared on The Gates and The League.

True Blood will also bring on Alexandra Breckenridge (Life Unexpected) and Vedette Lim (As the World Turns) as recurring actresses.  

Breckenridge, 28, will play Daisy, a member of a wiccan group led by Marnie (Fiona Shaw). Another new character, Marnie is a pretend psychic who develops powers after being taken over by the spirit of a witch.

Lim will step into the role of Naomi, a formidable fighter who participates in underground cage matches for money.

Production on the new season will begin next week.