Actors who rejected films and later on felt guilty

Ajay Devgan: The role of villian Ajay or Vicky from 'Baazigar' was supposedly given to Singham Ajay Devgan, but he did not feel comfortable for this role. Later on, the role was given to King Khan Shah Rukh Khan, which gave him National award. Speculations claim that Ajay Devgan talked to Shah Rukh Khan not to take up the role, but Shah Rukh Khan took his own decision.