Box office collections from overseas centres, increasing popularity of regional films and proliferation of smartphones would propel the Indian film industry to cross Rs 19,300 crore in size by FY 2017 from the current Rs 15,500 crore, according to a joint study by Deloitte and trade body Associated Chambers of Commerce & Industry of India (Assocham).

Box office collections will contribute about 74% of the total revenues. Box office collections are also expected to grow at a significant clip by the next financial year.

"Box office collections in India, which are currently estimated at over Rs 11,500 crore, are likely to cross the Rs 14,200-crore mark by 2017, and will account for about 74% of the majority of film industry revenues," said the report, titled "Digitisation & Mobility: Next frontier of growth for M&E".

Bollywood films, which currently account for about 43% of the total revenues, are likely to be challenged by regional films, especially Tamil and Telugu, given their increasing popularity in India and abroad, the report added.

Overseas box office collections are expected to grow from the current Rs 1,100 crore to Rs 1,300 crore during the period.