Rob talks Twilight bedroom scene and challanges during filming.
It has already topped the US box office and took almost £50million in its first weekend in the States, more than it cost to make.
Thousands of fans had camped out at promo events prior to the US release.
Now the producers have brought forward its UK release to fill a gap in the market created by the delay of Harry Potter And The Half-Blood Prince, which will not hit British screens until July.
Twilight premieres in the UK early next month and a sequel, New Moon, is already in the pipeline.
Fans of Harry Potter who are also Twilighters will recognise Pattinson, who played Cedric in Harry Potter And The Order Of The Phoenix and Harry Potter And The Goblet of Fire.
And he admits he couldn't wait to get his teeth into the role and his audition involved a bedroom scene with his beautiful co-star Kristen Stewart.
Robert said: "When I got into bed with Kristen, I said, 'I've only known you for an hour and we are in bed.' "I think I must have gone way over the top with it as well, because I remember looking up afterwards and director Catherine Hardwicke had a look on her face as if to say, 'What are you doing? You look like you're having a seizure.' "I felt something with Kristen during that scene, which very rarely happens between two actors. "I went out of the room really wanting the part and I sent an email to Catherine about it. I then read all the books in a weekend.
"I don't think Catherine knew that I was in Harry Potter. Getting the role was all based on the strength of my audition for her."
Before Robert could take on the role, the director was determined he would have a winning smile, fangs included.
"They wanted me to have perfect teeth," he admitted. "I never thought anything was wrong with my teeth, but the producers still wanted me to wear a brace." Robert also revealed his undead character's pale white skin, ruby red lips and multi-coloured eyes almost drove him batty. "Every time they did the vampire make-up I was shocked by it," he said. "The contact lenses were a nightmare. Every bit of make up I had to wear. It was so frustrating."
Meanwhile, Robert is getting ready to stick his neck out for the sequel and any other films of the books that follow.
"Oh yeah. I look forward to the sequels," he said. "Actually, I planned it out for three films or when they would try to kill me.
"I can't wait, because they can't kill me."