Speaking to the media, kollywood actor Bala said that he regrets the fact that he could not work with Ajith in 'Naan Kadavul'. The shooting started off with Ajith in the lead role. Ajith had also undergone a complete makeover for the flick. However the actor and the director parted ways due to difference of opinion. It was after this that Arya was roped in for the role.“The mistake is mine. I acted in a kiddish way. I regret for what has happened. But I am not bothered about it,”, the director was quoted as saying. Seems like Bala has future hopes of working with Thala.