"In a democracy everyone has the right to express their opinions. They should respond on the basis of the allegations made. Tacitly threatening (anyone) is unacceptable," said Mr Panneerselvam, who is popularly known as OPS.
Mr Stalin, who is also the DMK's working president, said, "Kamal Haasan had merely said there's corruption everywhere. He was threatened. Everyone has the right to criticise the government."
Mr Haasan had made the remark while responding to demands by a fringe group, Hindu Makkal Katchi, for his arrest and a ban on the Tamil version TV show Bigg Boss that he's hosting alleging vulgarity and hurting Tamil sentiment. The group also wanted the contestants on the show to be arrested for their "obscene statements".
Mr Haasan had tried to reason saying Bigg Boss is a social experiment. "It's a reality show on co-existence." The reality show is Kamal Haasan's TV debut.
A few years ago when the Tamil Nadu government stopped screening of his film Vishwaroopam, the actor had threatened to leave the country, after which the then Jayalalithaa government paved way for release of the film.
Mr Panneerselvam - a loyalist of former Chief Minister Jayalalithaa -- broke away from the AIADMK earlier this year after he was forced to make way for her aide VK Sasikala for the state's top post. Ms Sasikala, whose bid for power was cut short by her conviction in a corruption case, had named her proxy, E Palaniswami, as the Chief Minister.