For months, there've been speculations surrounding Rajkumar Hirani's Sanjay Dutt biopic with Ranbir Kapoor playing the protagonist. As Mirror had informed, the film kicked off on Saturday, January 14, in Mumbai. Dia Mirza, who'd made a brief appearance in Hirani's Dutt-starrer Lage Raho Munna Bhai, joined the filmmaker, RK, and Vicky Kaushal, who plays Dutt's friend in the biopic, to cut a cake. “The happiest place in the world is on a @RajkumarHirani film set (sic),“ she captioned the picture. Going by the widely acknowledged feel-good vibe of Hirani's films, we don't doubt that it is.