Kings Of Leon's Caleb Followill and his brother, Nathan Followill have tried to stab each other their documentary director has revealed.

The film 'Talihina Sky: The Story Of Kings Of Leon', directed by Stephen C. Mitchell, follows the US rock band from their origins in America's South to the present day.

"Those two [Caleb and Nathan] have notoriously gone at each other over the years. I mean broken shoulders, pulled hair, trying to stab each other. Those two are like twins almost. They're so close but they're too close, if that makes sense," Mitchell told Spinner.

Kings Of Leon were subject to a strict Pentecostal upbringing and the movie includes interviews with the band, as well as family and friends.

Meanwhile, Kings Of Leon have accepted Glee creator Ryan Murphy's apology after he called the band "self-centred arseholes".

(by Holly Frith)