Silambarasan Tesingu Rajendar, popularly known as Simbu or by his initials as STR, is an Indian actor, producer, director and playback singer who primarily works in Tamil cinema. He is the eldest son of actor/director T. Rajendar. From Wikipedia
Ali Fazal makes his Tamil debut in the Mani Ratnam drama that reteams him with Kamal Haasan after nearly four decades
