The by-election to the assembly seat was necessitated after the death of legislator and chief minister J Jayalalithaa.
The actor made the surprise announcement today.
Besides opposition DMK, ruling AIADMK's E Madhusudhanan and the party's sidelined leader T T V Dhinakaran are contesting for the prestigious seat.
"Vishal, chief of the Tamil Film Producers Council (TFPC) and general secretary of South Indian Artistes Association (SIAA) will file his nomination on Monday," his office said, adding that he will be contesting as an Independent candidate.
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