Nanban (transl. Friend) is a 2012 Indian Tamil-language coming-of-age comedy-drama film directed by S. Shankar. It is a remake of Rajkumar Hirani & Vidhu Vinod Chopra's Hindi film 3 Idiots (2009). The film stars Vijay, Jiiva, Srikanth, Ileana D'Cruz, Sathyaraj and Sathyan. The film's soundtrack and background score were composed by Harris Jayaraj and cinematography was handled by Manoj Paramahamsa. The film was produced by Gemini Film Circuit.

The film recounts the quest of two friends to find a lost buddy, whom they remember as a brilliant and optimistic student. Flashbacks portray episodes of their college life, up until their friend quietly vanished after graduation. The quest is triggered by the appearance of a rival classmate who once made a long-forgotten bet with them, and leads to a funeral that goes impossibly out of control, and a wedding they must crash.

A lengthy and controversial delay in casting delayed filming by a year. Filming took place for a total of eight months in various locations in Europe and India. The film was released on 12 January 2012 to generally positive reviews. The film was also screened at the Melbourne Film Festival.

Indian Express reported the film grossed ₹1.50 billion at the box office.