There’s no way to seperate those two – as we saw in the first episode of TRUE BLOOD‘s Season 1, and as we learned again in Season 7. Married in real life, Stephen Moyer (played Southern gentleman Vampire Bill Compton) and Anna Paquin (played Sookie Stackhouse) have founded their own production enterprise CASM, which already released FREE RIDE, a film starring Anna Paquin. 
By the way – if you want to have this photo featured here on top with the signatures of both actors for real: It’s up for sale on E-Bay, as AllStephenMoyer informs.