Chennai Express is a 2013 Indian Hindi-language action comedy film directed by Rohit Shetty and produced by UTV Motion Pictures and Red Chillies Entertainment. It stars Deepika Padukone, Shah Rukh Khan and with Nikitin Dheer and Sathyaraj in supporting roles. The film revolves around Rahul Mithaiwala, a businessman who accidentally boards the eponymous train and journeys from Mumbai to Rameswaram with the daughter of an influential crimeboss.

The first planned collaboration between Khan and Shetty was a remake of Angoor (1982). The script of Chennai Express, which was initially written as a backup project for Khan, was chosen instead. Conceived as a "commercial romance", the film was originally titled Ready Steady Po. Filming began in Mehboob Studio in October 2012 and was completed by May 2013. A large part of the film was set in Ooty, for which sets were constructed in Wai and also in Ramoji Film City. The soundtrack for Chennai Express was composed by Vishal–Shekhar, with the background score being composed by Amar Mohile. UTV Motion Pictures came on board as producer and distributor, marking its first active project with Khan after Swades (2004).

Chennai Express was released theatrically in international markets on 8 August 2013 and a day later in India. The film received mixed reviews from critics and it broke several box office records in India and abroad, becoming the quickest film to collect ₹1 billion (US$17.07 million) net domestically. The film surpassed 3 Idiots (2009) to become the highest-grossing Hindi film worldwide at that point. The film become second highest grossing Indian film in 2013. Chennai Express has stayed among the top 50 highest-grossing Indian films for over a decade, from its 2013 release to 2024. With a worldwide gross of ₹395.92–424.54 crore, the film's blend of romance, comedy, and action has resonated with audiences worldwide, securing its place as one of the most beloved and commercially successful films in Indian cinema.

At the 59th Filmfare Awards, Chennai Express received 7 nominations, including Best Film, Best Director (Shetty), Best Actor (Khan) and Best Actress (Padukone).