How did Robert Pattinson land his role as sexy vampire Edward in Twilight?

“I took half a Valium and then went into this thing — and all this stuff happened,” he tells April’s GQ of his audition.

“It was the first time I’ve ever taken Valium. A quarter of a Valium. I tried to do it for another audition, and it just completely backfired — I was passing out.”

Still, he won over costar Kristen Stewart, who plays his love interest, Bella.

“Everybody came in doing something empty and shallow and thoughtless,” says the actress, who demanded that he get the gig. “…Rob understood that it wasn’t a frivolous role.”

Pattinson admits he hasn’t seen any movie he’s been in — even Twilight. At the Los Angeles premiere, he managed to sit through the first 10 minutes before fleeing.

“I went out and sat in the car, having a full-blown panic attack,” recalls the actor, who is shooting the film’s sequel New Moon. He adds that he’s “not massively concerned about doing lots of acting jobs.”

“If it all just went, right now, I’d be like, ‘All right. I don’t really care,’” he says. “That’s probably a stupid thing to say. But I don’t, really. I think it’d be much worse to do a load of stuff that’s really bad.”

As for his love life, he tells GQ, “There’s literally not a single [true] story that could be written about me.”

“There’s this thing about my supposed girlfriend,” he goes on. “There’s this one girl who’s consistently mentioned. It’s like, ‘He’s dating this Brazilian model.’ … What’s her name —- Annelyse [Schoenberger]. I’ve never met her.” And he never popped the question to costar Stewart, either.

“I said that in some interview, as a joke — ‘Oh, I proposed to her multiple times,’” he says. “And then it gets printed: ‘On the set, he proposed multiple times.’”

Of Camilla Belle (with whom he’s been photographed), he says he didn’t steal her “from the Jonas brother,” referring to Joe Jonas.