Rajkumar Hirani has time and again expressed desire to make a sequel to his 2009 hit ‘3 Idiots’. The filmmaker has finally started work on the film with his writer Abhijat Joshi, state reports. With his big project ‘Sanju’ releasing this month, Hirani is now expected to turn attention to his next projects. However, ‘3 Idiots’ sequel is not his priority as the filmmaker is first planning to shoot the third part in the ‘Munna Bhai’ series. The former seems to be in the making but will definitely take a long time to even commence shooting, lest release.