Saif Ali Khan, in an interview with RJ Siddharth Kannan, confirmed that his eldest son Ibrahim Ali Khan is working as an assistant director (AD) in filmmaker Karan Johar's upcoming film. It was earlier reported that Ibrahim will assist Johar in 'Rocky Aur Rani Ki Prem Kahani'. The film stars Ranveer Singh, Alia Bhatt and Dharmendra.