24 is a 2016 Indian Tamil-language science fiction action film written and directed by Vikram Kumar. It is produced by Suriya under 2D Entertainment. The film stars Suriya in triple roles, alongside Samantha Ruth Prabhu and Nithya Menen. Saranya Ponvannan, Ajay, Girish Karnad, Mohan Raman, Sudha, Sathyan and Charle appear in the supporting roles. The film follows Sethuraman, a scientist, who invents a time travel watch but Athreya, his twin brother, does everything he can to get hands on that.

The film's development dates back to 2009, at which time it was to star Vikram and Ileana D'Cruz. However, in February 2010, the project was dropped due to the difference in opinions between the director, producer, and actor, facing rejection of the refined script. In August 2014, Suriya agreed to produce and act in the film, with principal photography commencing in Mumbai in April 2015, continuing in Nasik, Goregaon and Pune. The second phase of filming was done in Poland by the end of September 2015. Filming was completed in Chennai by November 2015. Produced by 2D Entertainment, the film has cinematography by S. Tirru. The soundtrack and film score were composed by A. R. Rahman, with lyrics by Vairamuthu and Madhan Karky.

24 was released on 6 May 2016. The film was a critical and commercial success, and won two awards at the 64th National Film Awards – Best Cinematography and Best Production Design. Suriya won the Critics Best Actor Award at the 64th Filmfare Awards.