Andhadhun (pronounced [əndʱaːdʱʊn] transl. Blind Tune) is a 2018 Indian Hindi-language black comedy crime thriller film co-written and directed by Sriram Raghavan. It stars Tabu, Ayushmann Khurrana, Radhika Apte and Anil Dhawan. The film tells the story of a blind piano player who unwittingly becomes embroiled in the murder of a retired actor.

The script of Andhadhun was written by Raghavan, Arijit Biswas, Pooja Ladha Surti, Yogesh Chandekar and Hemanth M. Rao. The film was edited by Surti, and K. U. Mohanan was its director of photography. Amit Trivedi composed songs for the film and Jaideep Sahni wrote the lyrics. Raftaar and Girish Nakod co-wrote the title song as guest composers. The film was shot in Pune in 44 days spread over more than a year; principal photography began in June 2017 and ended on 17 July 2018.

Andhadhun was released by Viacom18 Motion Pictures theatrically in India on 5 October 2018 to widespread critical acclaim. It won four awards, including Best Director and Best Screenplay, at the Screen Awards ceremony and five Filmfare Awards, including Best Film (Critics) and Best Actor (Critics) for Khurrana. It also won three National Film Awards: Best Feature Film in Hindi, Best Actor for Khurrana, and Best Screenplay. The film has grossed over ₹457 crore (US$64.9 million) at the worldwide box office, becoming the fourth highest-grossing Indian film of 2018. The film was remade in Telugu as Maestro (2021), in Malayalam as Bhramam (2021) and in Tamil as Andhagan (2024).