In a move that could cost them roughly $15 Million, Kings of Leon have canceled the remainder of their US tour after lead singer Caleb Followill left the stage last Saturday and didn't return to finish the show due to "internal sicknesses and problems have needed to be addressed," according to bass player and sibling Jared Followill's Twitter feed. There's a lot of speculation right now as to the true cause behind the turmoil, but first-time director Stephen C. Mitchell couldn't have picked a more pertinent time to release his upcoming behind-the-scenes documentary 'Talihina Sky: The Story of Kings of Leon.'

Having captured Kings of Leon on film over the course of ten years from before they were even a band to when they were selling out stadiums across the globe, we got to speak with Mr. Mitchell and get his thoughts on what's been going on with the Followill boys.

The full interview is still to come, but go ahead and check out an exclusive clip from the doc along with what what Mitchell had to say about the state of Kings of Leon and whether or not they'll be coming back for more.