"I know that Damon and Stefan are battling some really cool supernatural forces, but Damon and Stefan are starting to butt heads again and starting to bicker again," he explained to MTV News atCosmopolitan magazine's 2011 Fun Fearless Males party. "Which is what I think was a lot of fun about the show. As much as I love Paul Wesley and we're bros off screen, it's great when we're battling on screen."
The other big headline from the new episodes is that we FINALLY get to meet original baddie Klaus (played by Joseph Morgan), and Ian admitted he's a really cool force to have on set. "I've only seen him in his wardrobe and in his wardrobe tests, but he's a magnificent guy and I know his abilities are way up there," he explained. "I think everyone's on their toes now more because he's a bad ass."
Source: hollywoodcrush.mtv.com/2011/03/08/ian-so