Stephen Moyer initially thought his relationship with Anna Paquin was "ridiculous".
The showbiz couple, who met on the set of vampire drama 'True Blood', were concerned about the impact their romance would have on working together but are relieved it has caused no problems so far.
Stephen, 40, said: "It's quite fun when it's not rolling. It is so lovely. I've got nothing bad to say about it. "Certainly, to begin with when we got together, we were really concerned that it's ridiculous to get into a relationship when there's a possible seven years of working together, but it's been nothing but lovely, so I hope it carries on as thus."
However, the British star admits he is occasionally embarrassed on the set of the TV series because all of the people working on the show have witnessed his relationship from the beginning.
He said: "Because the crew, the cameramen, the actors and everyone grew up watching us, they've seen every single move I've ever made on her."
As well as being a couple off-screen, Anna, who plays telepathic Sookie Stackhouse in the show and Stephen, who plays vampire Bill Compton, are also a couple on-screen.