Rani Mukerji, who plays a crime branch officer in the film, met Mumbai Police Crime Branch chief and trained in Krav Maga, a street-fighting self-defense system developed for the Israeli military, as part of research for her role.
Lead actress Rani Mukerji married the film's producer, Aditya Chopra, four months before the film's release.
The first A-rated film (restricted to adults over 18) from Yash Raj Films.
The film contains numerous references to other Yash Raj Films productions. The song "Kajra Re" from Bunty Aur Babli (2005) (which also stars Rani Mukerji) can be heard towards the beginning of the film, ringtones play the song "Tune Mari Entriyaan" from Gunday (2014), the song "Tere Mere Beech Mein" from A Pure Desi Romance (2013) is heard on TV as is "Kamli" from Dhoom 3 (2013), and characters discuss Dhoom (2004).