'Inside Llewyn Davis': The Coen Bros, Oscar Isaac & T Bone Burnett talk Justin Timberlake, Marcus Mumford & creating this musical movie

The Coen Brothers' newest film, Inside Llewyn Davis, hits theaters this weekend and we have some new information regarding the critically acclaimed movie. The writing-directing brothers along with star Oscar Isaac and composer T Bone Burnett recently opened up about the making of the film and delved into the casting, music and filming process. In fact, Isaac had a lot to say about his character's cat!

"There were four or five cats that had different personalities depending on what was needed," Isaac said, explaining an incident where he ended up getting scratched across his face by one of the cats. "We had a docile one and a squirrelly one that had to be tied to me so it didn't jump loose. That one didn't like his involvement in the movie and rebelled against it; which included rebelling against the person holding it."

Clearly there was more to the movie than the cat situation though and one huge aspect was the involvement of pop sensation Justin Timberlake and how he worked into the folk music of the film.

"I'd done Social Network with [Timberlake] and knew him as a guy who was up for a good job and a great experience," said producer Scott Rudin. "There are a handful of directors in the world who when they call, you go. Joel and Ethan are those guys. Justin didn't want to miss being in a Coen brothers movie."

"Here's the thing," said Ethan Coen. "If you're not offering a lot of money, they're doing it because they think it's interesting."

His brother Joel added: "The less you offer for a part, the more likely you are to get someone who actually knows what they are doing."

Overall, this film is all about the music.

"This is a story about a musician," says Burnett. "The place where he lives is in his music. So when you're introducing the character, the way to introduce him is in the song, and not just a snippet of a song, but the full song."

Read more on Inside Llewyn Davis here!