Aamir Khan, who worked with Rajkumar Hirani in Three Idiots was one of the first ones to arrive.
A source told a leading daily, "Many of Raju's friends were there for him. Be it Aamir, Vidhu Vinod Chopra, Boman Irani, Sharman Joshi, Raageshwari Loomba, Abhinav Kashyap or Shantanu Moitra, they all had come to lend their support."
Raju Hirani's friend and actor, Boman Irani also tweeted his condolences, "Raju Hirani's father passed away this morning. He was a great inspiration to Raju and also to all of us!"