Udhayam NH4 is a 2013 Indian Tamil romantic thriller directed by debutant Manimaran, a former associate of Vetrimaaran. The film features Siddharth and newcomer Ashrita Shetty in the lead roles. Vetrimaaran wrote the script, did the screenplay, and penned the dialogues for this film. The story takes place in Bangalore, Karnataka. The film's soundtrack and background score were composed by G. V. Prakash Kumar. The film released along with a dubbed Telugu version titled NH4 on 19 April 2013.