OK Jaanu (English: OK Darling) is a 2017 Indian romantic drama film directed by Shaad Ali, story and screenplay by Mani Ratnam. Produced by Mani Ratnam and Karan Johar under their banners Madras Talkies and Dharma Productions respectively. It is an official remake of Mani Ratnam's Tamil film O Kadhal Kanmani starring Dulquer Salmaan and Nithya Menen. The film stars Aditya Roy Kapur and Shraddha Kapoor in the lead roles, portraying a young couple in a live-in relationship in Mumbai with Naseeruddin Shah and Leela Samson play supporting roles as an older couple in the film, portraying the younger couple's landlords. A. R. Rahman composed the film's score and soundtrack. Gulzar is the dialogue writer of this film. Gulzar has also written the lyrics for the songs in the film.