Kings of Leon Film Exposes Band's Pentecostal Past, Family Tensions

Nathan is third from the left, in the funny hat.

A few weeks ago Kings of Leon stopped performing partway through their Dallas concert after lead singer, Jared Followill, stormed off the stage. Two days later, the rest of their U.S. tour was canceled amid speculation that the groundbreaking American rock band, made up of three brothers and one cousin, was suffering some serious synergy issues.

But it seems fans can breathe a sigh of relief.

“They are just tired from touring, they just don’t stop. Everyone needs a break from each other once in a while, and they just need a little time off,” Stephen C. Mitchell, who signed the then-unknown musicians several years ago, told FOX411’s Pop Tarts column. “They’re just having a little rest now and they’ll be fine. I’m looking forward to seeing them play again soon. They are still young; they have a whole other chapter ahead of them.”

And Mitchell should know. He documented Kings of Leon's  journey from their parents’ garage to the biggest stadiums in the world in the insightful film “Talihina Sky: The Story of the Kings of Leon." “Talihina Sky” delves deeply into the dynamics between the brotherhood band – the good, the bad, and the ugly.

“They are brothers too so they’re relationship is a little different to other bands, brothers can pretty much say whatever they want to each other,” Mitchell explained.

The Kings of Leon crew has been known over the years to make their frustrations with one another quite clear the public. Following the Dallas debacle, Jared Followill tweeted: "Not so good morning 4 me today. Ashamed & embarrassed by last night's fiasco. Can't apologize enough, utterly gutted. A million I'm sorrys."

Mitchell’s response?

“They should be banned from tweeting,” he laughed.

Audiences may also be surprised to learn in the film about the Followills’ connection to the Pentecostal church, having grown up with their traveling preacher father. Although they’re lives may not be dedicated to the Lord in the same way as it were 10 years ago, their underlying faith remains strong.

“Even though you grow and advance in the world and change your views somewhat, I still think some of those core beliefs are there,” Mitchell said. “This really is their true back story, this shows the Pentecostal world they came from and the ministry, and also the very large, colorful family that they come from and that’s obviously a big part of the film. The band is executive producers of the film, and they wanted to put their back story out there once and for all. A lot of it was hard for them to say ‘okay, use that scene.’ But they take people on a wild and truthful journey.”

At one point in the film, there is tension about whether or not the boys have chosen a life path of fame and fortune, and whether they’ve strayed from righteousness and God’s will.

“I think their mom would like to line us all up and wash our mouths out with soap a few times,” said Mitchell. “But they (the parents) are real proud of the boys. They always knew that they were so talented when they were young that they were going to be something, whether that be playing in a big stadium or playing to a ministry of their own. But now that they are out there performing, I’m sure they couldn’t be more proud of them.”

“Talihina Sky: The Story of the Kings of Leon” premieres on Showtime on Sunday, August 21 10pm.