The Twilight hunk, who is rumoured to be dating his co-star Kristen Stewart, said that he thinks that attraction is almost always instant and if it isn't there to begin with, then it probably never will be.
He told MTV News, 'I think people can fall in love at first sight. I think pretty much all people who love each other, had some kind of thing at first sight.
'I mean, there has to be some kind of moment where you, like, feel a different energy around someone.
'Generally, if you don't notice someone ever, you're probably not going to fall in love with them.'
The 24-year-old also recently admitted that he couldn't have sex with somebody that he didn't love.