Anna Paquin is pregnant with twins.

The 29-year-old actress is expecting for the first time with husband Stephen Moyer - with whom she stars in True Blood - and their co-star Sam Trammell, who is also a father of twins, has confirmed the pair will be having two babies.

"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," he told US Weekly.

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. "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," he added.