The Vampire Diaries is now in its seventh season, which means Ian Somerhalder and Paul Wesley have been playing brothers for nearly seven whole years. That means hundreds of late nights, craft service dinners and crazy conventions—a.k.a. enough time to get to know each other better than most people ever know their coworkers.
But how well do they really know each other?
E! News sat down with the Salvatores on the Atlanta set of their show to ask them questions they probably should know about each other, like their signature dance move—which you might or might not have seen on the show before—their go-to guilty pleasure craft service snack, and the drink they each love to order.
Yes, there's bourbon involved, because sometimes art imitates life like that.
Watch for their loving mocking of one another, stay for their impression of the other's go-to selfie face. There are definitely duck lips involved.
Unsurprisingly, there are a couple of questions that each of them ace—and there are a couple that are way more difficult than you'd think. Watch the video above to see who struggles the most, and who truly knows his onscreen brother well, zodiac sign included.
The Vampire Diaries airs Thursdays at 8 p.m. on The CW, followed by The Originals. In tonight's episode, Somerhalder is shirtless if that happens to appeal to you. (Check out E! News' exclusive clip of the episode here, in case you can't wait until it eventually airs on television!)