Two brothers, Achin and Sarthak Narula became the first ever contestants to win the Rs. 7 crore prize in the game show 'Kaun Banega Crorepati' on Saturday. Bollywood mega-star Amitabh Bachchan, who hosts the show, tweeted "The beauty and the excitement of KBC at its very maximum! Just an incredible moment," with a picture of the two.