Filmmaker Rajkumar Hirani and Shah Rukh Khan were earlier set to collaborate on ‘Munnabhai MBBS’. However, things did not fall into place, and Sanjay Dutt was roped in for the titular character and the film emerged to be a hit. Now, the two collaborated for the first time in ‘Dunki’, and the filmmaker recently mentioned how he was keen to work with the actor ever since he first saw him in the television show ‘Circus’.