It will soon be double the trouble for 'True Blood' star Sam Trammell. The actor is expecting twins with his longtime girlfriend, Missy Yager, PEOPLE reports.

"The couple is thrilled and excited," Trammell's rep confirmed.

Trammell and Yager have been dating for eight years after meeting in New York while they were both doing theater. Yager has been seen on 'Mad Men' and 'Boston Public,' while Trammell plays bar owner Sam Merlotte on HBO's vamp-tastic show.

There's no word on when Trammell and Yager's bundles of joy are due.