Robert Pattinson and Kristen Stewart revealed that they spent 12 hours filming a sex scene on "The Twilight Saga: Breaking Dawn".

According to Life & Style magazine the scene took half a days to shoot.

The scene sees Pattinson's character, Edward Cullen, bite down on a pillow to control his urge to bite Kristen Stewart's character, Bella Swan.

Pattinson said that he gets "really carried away" when he kisses Stewart.

He said "When we start the kissing scenes I forget we’re surrounded by a load of people. I actually end up getting really carried away...It’s only when the kiss is finished that my mind registers there’s actually a set full of people around, and I just walk away embarrassed.

“By the time you guys see the nude scenes it looks really erotic because it’s been edited and you’ll have music. What you don’t see is the eight camera men, the director and about 50 people on set.”

“The truth is you come out of your dressing room in a little robe and know that in a few minutes, you’re going to be taking it off in front of a lot of people.”