The film went on floor last month and several celebrities including Vidya Balan, Boman Irani, Anil Kapoor, Raju Hirani have visited the sets of the movie.
"I knew that getting Aamir Khan, Boman Irani, Vidya Balan, Raju Hirani and Anil Kapoor to speak to the 220 cast would help instill dedication and effort that this film would require," director Ram Madhvani said in a statement.
"I'm also very touched that Aamir Khan gave the Mahurat shot of our film," he added.