Robert Pattinson says he and girlfriend Kristen Stewart could already be married.

The 25-year-old actor and the 21-year-old actress' characters Edward Cullen and Bella Swan tie the knot in 'The Twilight Saga: Breaking Dawn - Part 1' and Robert has revealed the director used a real priest for the on screen ceremony which means they're husband and wife in the eye's of God.

Speaking at a press conference in Stockholm, Sweden, today (28.10.11), he joked: "The wedding scene's funny because we used a real priest. So technically we are already married because he did all the things you would do in a normal ceremony. So we don't have a civil union in law, but I guess in the church we are actually married."

Robert also revealed both her and Kristen felt "vulnerable" when they were shooting the film's sex scenes because they were so many different people on set, most of whom seemed as nervous as the performers.

He added: "The sex scenes were difficult. The set was crazy and you have about 20 people in the room and someone saying things like, 'No, Bella would not have made that noise. Can we do it again?'

"It was very charged, but a very tender and sentimental scene. It's not a scene from the book, so everyone was nervous about doing it right. A ton of other people were nervous. And, Kristen and I were both worried about the shape of our bodies would look on camera. We felt vulnerable."

The 'Twilight Saga: Breaking Dawn - Part 1' will be released on November 18.