As per reports, producer Ekta Kapoor had earlier approached Kareena Kapoor Khan to star in 'Mental Hai Kya', initially titled 'Badtameez Dil', over bold scenes and nudity. Kareena reportedly did not do the role as she felt that the storyline was dark, explosive and way ahead of its time. Later, Kangana Ranaut was confirmed as the film's female lead.