Sunil Kumar, known by his stage name Narain, is an Indian actor, who has starred in Malayalam, Tamil and Telugu films. He made his debut in Adoor Gopalakrishnan's Nizhalkuthu (2002), followed by performances in Malayalam films 4 the People (2004), Achuvinte Amma (2005), and Classmates (2006). Narain's Tamil and Telugu debuts were in Mysskin's Chithiram Pesuthadi (2006) and Jayaraj's Yuvasena (2004).

Achuvinte Amma is a 2005 Indian Malayalam-language drama film directed by Sathyan Anthikad and written by Ranjan Pramod from a story by Rajesh Jayaraman. It stars Urvashi, Meera Jasmine and Narain. The music is composed by Ilaiyaraaja. It was also a comeback movie for Urvashi in Malayalam after a gap of six years. The film has won several awards, including the National Film Award for Best Supporting Actress (Urvashi), Filmfare Award for Best Film - Malayalam, and Filmfare Award for Best Actress - Malayalam for Meera Jasmine.