Robert Pattinson has revealed that faking an orgasm for the sex scene in 'The Twilight Saga: Breaking Dawn Part 1' was 'embarrassing'.

The 25-year-old actor, who filmed a sex scene with real-life girlfriend Kristen Stewart for the vampire movie, admitted that having the entire crew watch as they shot the sequence was not a pleasant experience.

"We were staring into the camera doing orgasm faces and stuff and it becomes unbelievably embarrassing, " Contactmusic quoted the actor as telling Espectacular TV.

"But I think it ended up good at the end I think, " he added.