Kaalai (transl. Bull) is a 2008 Indian Tamil-language action film directed by Tarun Gopi. The lead roles are played by Silambarasan and Vedhika. Supporting roles are played by Sangeetha, Seema, Santhanam, Lal and Sulile Kumar. The film's score and soundtrack were composed by G. V. Prakash Kumar.

Silambarasan Thesingu Rajendar, nicknamed as Simbu or his initials S.T. R. and known as Little Super Star, is an Indian actor, filmmaker and musician in Tamil cinema. He is the eldest son of actor and director T. Rajendar. He began his acting career by playing roles as a child artist in films directed by his father, before his first lead role in his father's Kadhal Azhivathillai (2002).