Bigil (transl. Whistle) is a 2019 Indian Tamil-language sports action drama film directed by Atlee and produced by Kalpathi S. Aghoram under the banner AGS Entertainment. The film stars Vijay in the title role and dual roles as a father and son, while Nayanthara, Jackie Shroff, Vivek and Kathir appear in other prominent roles. In the film, Michael Rayyapan alias Bigil is a footballer-turned-gangster who decides to coach a women's football team when their coach gets attacked.

The film was officially announced on 14 November 2018, under its working title Thalapathy 63 (referring to Vijay's 63rd film as an actor), and it further marked the third collaboration of Vijay and Atlee after Theri and Mersal. Principal photography for this film commenced on 21 January 2019, where predominantly took place around Chennai, with a minor schedule in Delhi, and ended on 14 August. The film's title Bigil, was announced on 22 June 2019, along with the first look poster. The film has music composed by A. R. Rahman, with cinematography handled by G. K. Vishnu and editing done by Ruben.

Bigil was released on 25 October 2019, coinciding with the occasion of Diwali, where it received mixed to fairly positive reviews from critics. The film emerged as the highest-grossing Tamil film of 2019, collecting around ₹285–300 crore upon its release, it further became one of the highest-grossing Tamil films and Vijay's highest-grossing film in his career at that time until it was surprassed by Varisu and Leo. The film completed its 100-day theatrical run on 1 February 2020, and also won two awards each at the Zee Cine Awards Tamil, Ananda Vikatan Cinema Awards, three Edison Awards and a SIIMA Award.