'Pathonpatham Noottandu' directed by Vinayan is set to be released in theatres during Onam festival. Now Vinayan has shared a news for the fans that superstars Mammootty and Mohanlal are collaborating for the film. Even though they are not acting in the film, the actors will be giving voice. In a Facebook post, Vinayan wrote that Mammootty and Mohanlal have blessed the film 'Pathonpatham Noottandu' by lending their voice. While Mohanlal introduces the legendary hero Arattupuzha Velayudha Panicker in his voice, Mammootty will lend his voice to give a curious narrative of the turbulent period, wrote Vinayan on Facebook post. The film will hit the theatres on Thiruvonam day September 8.