When Nina and I met, it was actually at the screen test. All the other actors were coming up to her, saying “Hi, my name is so and so.” I wouldn’t even look her in the eye. I wanted our scene in the room, at the studio, to feel authentic, like we had never met before.
Source: Entertainment Weekly
By the way, Nina too mentioned this first audition with Paul in a recent interview with EW:
Oh my God. I can’t remember how many guys there were, but there had to have been at least 11. There might’ve been more than that, and I’m just trying to forget some of them. [Laughs] It was the longest day ever and they were all so different. I had already booked the part, and so they all had to have chemistry with me. And they were all trying real hard to have chemistry with me. The only one who wasn’t trying too hard, that didn’t speak to me at any point unless we were filming, was Paul Wesley—so it’s funny to think that he did the right thing. Kid got the part.