Anna Paquin and her husband Stephen Moyer are going to welcome twins into the world, according to their True Blood co-star Sam Trammell.

Anna Paquin is pregnant with twins.

The 29-year-old actress is expecting for the first time with her husband Stephen Moyer, who stars with her in True Blood.

The co-star Sam Trammell, who is a father of twins, has confirmed the pair will be having two babies.

He told Us Weekly magazine: “I'm so excited for them. We sent them a special gift. It's so interesting that True Blood has become like, the 'twins' show.”

Giving his advice, Sam urged the pair just to “hold on tight” as it is tougher having multiples, but he admitted he didn't know any other way of parenting.

He added: “It's harder, having twins, but it's all we know. So we're trying to impart some decent wisdom. I told them to hold on tight.”

Stephen, who has children Billy, 12 and Lilac, 10, from previous relationships, recently joked that Anna being pregnant brings the “crazy” to his already extended family.

He said: “I love my kids so much. And I think the fact that Anna is pregnant just adds more crazy to the bundle of fun.” - Bang Showbiz