Anna Paquin is careful of the "outlandish" things she says around the True Blood writers as they sometimes end up in the show.

The actress is famed for her role as Sookie Stackhouse in the HBO series. True Blood follows the co-existence of vampires and humans in a fictional town in Louisiana.

Because of the fantasy content, Anna has to bite her tongue with discussing far-fetched ideas around the production team, as they sometimes end up working them into the script.

"Sometimes I pitch things that are a joke. There was a scene in episode nine [of season four] with me Steve [Moyer] and Alex [Skarsgrd] that I pitched, which I can't you about, but was sort of a joke, but not really," she explained in an interview with SciFi Now.

"Sometimes I wonder if I say things that are really outlandish and because of the nature of our show, they actually end up in the show."

Anna's character Sookie has a complicated relationship with vampire Bill. The star likes to get her teeth stuck into the intricate romantic storylines.

"I'm totally happy for our characters to be as sad, distraught, messed up and hating each other as they like," she said.

"We don't really have everything be perfect or happy for too long. It's not interesting television if everything works out for Bill and Sookie, and then they adopt five babies and live happily ever after."