SK 21 (tentative title) is an upcoming Rajkumar Periasamy directorial, which stars actor Sivakarthikeyan in the lead. The movie is a production venture of Kamal Haasan's Raaj Kamal Films International (RKFI) and has Sai Pallavi playing female lead and GV Prakash for music. The movie went on floors with an official pooja ceremony today and its video can be seen above.

Touted to be a story high on patriotism, SK 21 will see Sivakarthikeyan play an army officer. The movie jointly produced by Sony Pictures International Production, is Rajkumar Periasamy's second film after Rangoon (2017) starring Gautham Karthik.