The pictures include new cast members Chris Meloni (Law and Order: SVU), Scott Foley (Grey's Anatomy) and Lucy Griffiths (Robin Hood).
Photo gallery - True Blood fifth season first images:
Copyright: HBOMeloni's character is reportedly an ancient and powerful vampire, while Griffiths will also be playing a new vampire.
Foley's role has been kept more under wraps, but he has hinted that he does not play either a werewolf or a vampire.
It has been confirmed that showrunner Alan Ball will step down following the fifth season.
The season premiere of True Blood will begin on HBO on Sunday, June 10.
Watch a trailer for the season below: