There’s been plenty of rumours that the pair have been replicating their onscreen romance when the cameras stop rolling. Despite their denials speculation has increased after they were pictured at an airport holding hands, and after Twilight director Catherine Hardwicke seemed to confirm that they’re an item. Kristen had trouble describing Rob when interviewed by Heat, but said that he’s not as broody as you might imagine. She said: "He's a heart-throb. He sort of comes across like a tortured artist, but he's not.

He's.oh God, this is tough. I'm over-analytical and I want to say he's over-analytical. He's like a little boiling pot just really constantly thinking.

Kristen added: "I think the chemistry between Rob and I is sort of an instant thing. Not that I can identify it. But he's such a good actor, a really intense guy.

Twilight: New Moon hits our screens on November 20, with movie guru Grant Lauchlan interviewing Rob, Taylor and Kristen for a New Moon special airs on STV at 8pm tonight. stv.tv will have exclusive extended interviews with the star trio.