Mark Antony is a 2023 Indian Tamil-language science fiction action comedy film directed by Adhik Ravichandran. The film stars Vishal and S. J. Suryah in dual roles with Ritu Varma, Sunil, Selvaraghavan, Abhinaya, Y. G. Mahendran, Nizhalgal Ravi, Redin Kingsley and Manikandan in supporting roles. In the film, Mark, the son of a gangster Antony, finds a telephone which can contact the past, but Madhan, the son of rival gangster Jackie, wants it for himself.

The film, produced by S. Vinod Kumar under Mini Studio, was officially announced in December 2021 under the tentative title Vishal 33, as it is Vishal's 33rd film as the lead actor, and the official title was revealed in January 2022. Principal photography began in May 2022 and wrapped by May 2023. The music was composed by G. V. Prakash Kumar, while the cinematography and editing were handled by Abinandhan Ramanujam and Vijay Velukutty.

Mark Antony was released in theatres on 15 September 2023, during Vinayagar Chathurthi. The film grossed over ₹100 crore, becoming the highest-grossing film in Vishal's career.