India, Nov. 15 -- While many believe that Rajkumar Periasamy's upcoming Tamil film OM is the first time Mammootty and Dhanush will be seen on-screen together, they couldn't be more wrong. The duo once worked together on a Malayalam film 13 years ago. Recalling the experience at their upcoming film's pre-release event, Dhanush revealed that he once believed the Malayalam superstar was 'rude'. It took him a while to understand his sense of humour.

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At the pre-release event of OM, Dhanush made Mammootty chuckle when he said, "Mammootty sir means thug life; thug life means Mammootty sir." Expla...