We Go Behind The Scenes Of 'Mortal Instruments: City Of Bones'

It's real, and it's spectacular: the movie adaptation of Cassandra Clare's "Mortal Instruments: City of Bones" began shooting in Toronto this summer, marking the start of production on one of the most exciting book-to-film deals ever to exist. And because we are all up in the "City of Bones" business, MTV News took a trip to the set for a chat with the cast and a behind-the-scenes peek at a moment from the books that fans will surely recognize.

You do recognize it, right? That's Clary, played by Lily Collins, attending a seriously kickin' house party for the supernatural set. (Look closely, and you may see a faerie hooking up with a satyr! ...No, okay, we made that up. But still, it could totally happen!) And even from this little glimpse into the inner "City of Bones," it's clear that the filmmakers are taking great care to create a distinctive world that really captures the feel of the books.

"It's really a story that's based in reality as much as it is in this fantasy world. They're coexisting," Lily said, but was quick to add that this movie is much more than the sum of its pretty set pieces. "It's more emotionally and character-based than just aesthetically beautiful. It's got amazing imagery and the CGI is going to be incredible, but it's not just about that."

And even the cranky Jamie Campbell Bower, whose performance as the snarky Jace will no doubt be helped by his irritation at the middle-of-the-night shooting schedule, is psyched to be part of the film.

"I'm not in the world's greatest mood, but I get to go to work, and I get to be a bit of an a--hole," he gloated.

Meanwhile the enthusiasm of fans who can't wait to see the book brought to life hasn't just been an abstract for the actors; Robert Sheehan recounted his shock at finding them cheering from the sidelines when they arrived to begin shooting.

"There were fans there waiting for us," he said, with a tone of amazement, adding that he was especially confused when some of them asked him to sign the book. "I was like, this isn't my book!" he recalled. "So that was quite odd...but I did it anyway."

Are you loving this first peek behind the scenes on the "City of Bones" set? Tell us in the comments and on Twitter!