SK 21 (tentative title) is actor Sivakarthikeyan;s upcoming movie which is produced by Kamal Haasan and directed by Rajkumar Periasamy. MovieCrow had previously reported that Sai Pallavi will be playing female lead in SK21 and now Raaj Kamal Films International has officially announced the same, marking the actress' birthday.  

Touted to be a big budget PAN Indian movie high on patriotism, SK 21 is written and directed by Rajkumar Periyasamy and is jointly produced by Sony Pictures Films India and R. Mahendran. The technical crew of this film includes Anbariv for stunts.