Dhyan Sreenivasan made his debut in a film directed by his brother who is best know for his work in what?
Dhyan Sreenivasan:  He made his debut in 2013 with "Thira", directed by his elder brother Vineeth Sreenivasan. Vineeth Sreenivasan: Vineeth Sreenivasan (born 1 October 1985) is an Indian playback singer, lyricist, film actor, director, producer and screenwriter best known for his work in Malayalam cinema.
Malayalam cinema