Karan Johar is all set to welcome Rohit Shetty and Ajay Devgn in the latest episode of 'Koffee with Karan 8'. During their candid chat, the filmmaker will also reveal how he used to be scared of the late Amrish Puri during the shoot of 'Dilwale Dulhania Le Jayenge' as she was an assistant director on the film's sets.