Johnny Gaddaar (transl. Johnny the Traitor) is a 2007 Indian Hindi-language neo-noir thriller film written and directed by Sriram Raghavan, produced under the banner Adlabs. It stars Neil Nitin Mukesh, in his film debut, alongside Dharmendra, Zakir Hussain, Rimi Sen, Vinay Pathak, Govind Namdeo, Dayanand Shetty and Ashwini Kalsekar. The film received critical acclaim and was a sleeper hit at the box-office. It was remade in Malayalam as Unnam, in Telugu as Kamina and in Tamil as Johnny.

The film was later identified as an uncredited adaptation of the 1962 French novel Les Mystifies by Alain Reynaud Fourton, which was first adapted into the 1963 French film Symphony for a Massacre by Jacques Deray. In 2018, Raghavan confessed to having read the novel while he was working at ISRO on public safety announcement films.