This study aimed to explore the existence of hook-up behaviour among emerging adults in the Indian metropolitan cities of Bangalore, Mumbai, Delhi and Kolkata. The study used a survey design. The sexual behaviour subsection of the Sexual Behaviour Questionnaire was used to assess the frequency of the various types of hook-up behaviour. The results indicated that the participants’ frequency of hook-up behaviour was 55.13%. Overall hook-up behaviour was higher for males, whereas females reported the highest incidence of hook-up behaviour for kissing. Hook-up behaviour was highest for emerging adults living independently in apartments, followed by those living in paying guests/hostels and living with family. The findings provide evidence for a hook-up culture in Indian metropolitan cities