Mr Haasan, who has been prepping for politics for months, will nevertheless stick to his plan to launch the mobile application at around noon. He has called the phone app the "first step" in his political journey.
"He will be reaching out to people with his special message," his spokesperson said, adding that he would also speak about his "plans for the future".
Hours after his team made the announcement to disappointed fans, the star took to Twitter to reach out and explain. "To those who love me and dislike the idea of my cancelling my birthday celebrations," he tweeted in English and Tamil, late on Monday night
For the party that he promised to launch, the outspoken actor with over 200 movies in 40 years has spoken of recruiting "fresh, young faces" and crowd-sourcing funds to ensure transparency in his party.
Mr Haasan has attributed his decision to float a new group rather than join a party, saying he hadn't been able to find a party that matches "his reformatory goals" in politics.
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