The film is Shaad Ali's second remake of a Mani Ratnam Tamil film.
Remake of Tamil Movie OK Kanmani directed by Mani Ratnam
The ringtone on Aditya's phone is from the popular NES game Contra from Stage 2 (Base stage 1).
The Humma Humma song is a remake of the Tamil song of the same name from the film Bombay (1995), which was composed by A.R Rahman, who also composed the music for this film.
Shradda Kapoor and Aditya Roy Kapoor had earlier starred together in Aashiqui 2 (2013). This film is their second collaboration.