Anna Paquin Dating Her True Blood CoStar

Anna Paquin and Stephen Moyer -- who are romantically linked on the HBO vampire series -- are a couple off screen as well.

See what stars hooked up in 2008!

"We are together," Moyer confirms to TV Guide Magazine.

Moyer plays a 173-year-old vampire named Bill Compton opposite Paquin, who portrays telepathic watiress Sookie Stackhouse. Their real-life romance first sparked at a True Blood audition, but they both decided to wait to go public.

See photos of Hollywood's most romantic couples.

"The reason it was dodged last year was very intentional on both our parts," Moyer says. "It was very important to me that the cast and crew we were working with didn’t feel it was fickle, and didn’t feel it could possibly potentially encroach on their lives, you know, just like, 'Oh the two stars are having a thing.' We didn’t want to take anything away from the show. The show is the star, not the two people having a relationship."

Will Anna and Stephen last as long as these famously happy couples?

Moyer -- who has two young children from a previous relationship -- divides his time between the home he shares with Paquin in L.A. and his native London.

"It’s just exciting, and that was there from day one," Moyer says. "We always take the piss out of each other and are silly with each other, and it is great. We’re very, very happy. She’s the best."

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