Prabhas-led film 'Kalki 2898 AD', released on June 27, made its box office debut with a thunderous opening. The movie is currently in the third week of its release and still minting moolah at the ticket windows. As per makers, the sci-fi thriller has already crossed the Rs 1000 crore mark at the global box office. As per a report in Bollwyood Hungama, the makers of 'Kalki 2898 AD' have sent a legal notice to two individuals- Sumit Kadel and Rohit Jaiswal, for their tweets against the film's box office collections. They claimed that the box office numbers given by the producers are fake.