It's not one, but two little babies that True Blood co-stars Anna Paquin and hubby Stephen Moyer are expecting twins this fall.

Paquin and Moyer, who play lovers in the hit HBO vampire drama, married in Malibu, Calif., in 2010.

Moyer has two children from previous relationships: Lilac, 10, and Billy, 12.

"I'm so excited for them," the couple's costar Sam Trammell - father to 11-month-old twins Winston and Gus with girlfriend Missy Yager - told Us Magazine.

 "We sent them a special gift. It's so interesting that True Blood has become, like, the 'twins' show," he added.

"It's harder having twins, but it's all we know. So we're trying to impart some decent wisdom [on Paquin and Moyer]. I told them to hold on tight!"

Moyer seems to be up for the challenge though. "It's always amazing," he told Zap2it in May of his wife's pregnancy. "I love my kids so much. And I think that the fact that Anna is pregnant just adds more crazy to the bundle of fun."

Paquin and Moyer announced the pregnancy last April after near the end of filming for Season 5 of the vampire soap.

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