Knock Out is a 2010 Indian Hindi-language action thriller film directed by Mani Shankar. The film stars Sanjay Dutt, Irrfan Khan and Kangana Ranaut, and is an unauthorized remake of Phone Booth. In October 2010, the Bombay High Court ordered the film's producers to pay a portion of their revenues to 20th Century Fox, who own the rights to Phone Booth. Released on 15 October 2010, the film was a commercial failure.