Thangalaan (transl. The Son of Gold) is an upcoming Indian Tamil-language historical action drama film directed by Pa. Ranjith and produced by K. E. Gnanavel Raja under Studio Green and Neelam Productions. The film stars Vikram and Pasupathy, alongside Parvathy Thiruvothu, Malavika Mohanan, Daniel Caltagirone and Harikrishnan Anbudurai in supporting roles.
 The film was officially announced in December 2021 with the tentative title Chiyaan 61, as it is Vikram's 61st film as a lead actor, while the title of the film was revealed in October 2022. Principal photography began the same month and wrapped in July 2023. The film has music composed by G. V. Prakash Kumar, cinematography handled by A. Kishor Kumar and editing by Selva RK.
 Thangalaan is scheduled for a worldwide theatrical release on 26 January 2024, coinciding with Republic Day.
 Set during the British rule in India, the film is about the tribal leader Thangalaan's valiant struggle against the British after they plot to seize his land for gold mining.
 While working on Madras (2014), Pa. Ranjith had narrated a script to Vikram and planned to team up for the film, but was delayed. Until, it was reportedly picked up again in September 2021 and would be produced by K. E. Gnanavel Raja under Studio Green. It was reported that Anirudh Ravichander would compose songs for the film, but was later on announced G. V. Prakash Kumar is composing the songs. On 2 December, the project was officially announced by Studio Green, tentatively titled Chiyaan 61. Rashmika Mandanna had signed to play the female lead role, but was replaced by Malavika Mohanan, due to schedule conflicts. The latter learned Silambam for her role in the film. Ranjith, during a media interaction in May 2022, had revealed that the Kolar Gold Fields in Karnataka was the backdrop for the film and that it was a historical drama about working-class miners who discover gold in the 19th century. On 23 October, coinciding with Diwali, the title Thangalaan was announced with a teaser of the film.
 Principal photography commenced in October 2022 with a short schedule in Chennai, for some initial portion, later on moved to Kadapa, and was later moved to Madurai, where an action sequence with Malavika and Vikram was shot. The team moved to Hogenakkal Falls in December. The same month, a shoot was done in Maldives. The second schedule shooting happened a film city in Chennai in January 2023, with Malavika joining in February. With the second schedule wrapping up in February, the team started shooting the third schedule in Kolar Gold Fields in the same month for close to 6 weeks. English actor Daniel Caltagirone started shooting for his portions the same month. The final schedule started in April, and was shoot in Madurai and Chennai, with the shoot also halted temporarily in May, due to a rib injury that Vikram suffered on the sets, before resuming in June and then wrapping up shooting in 4 July.
 The music and background score is composed by G. V. Prakash Kumar, in his maiden collaboration with Ranjith; third with Vikram after Deiva Thirumagal (2011) and Thaandavam (2012). The audio rights for the film were acquired by Times Music for ₹5 crore (US$630,000). The track "Thangalaan Exclusive Making Theme" that was featured in the behind-the-scenes video, which released on Vikram's birthday (17 April 2023), released on 19 April.
 Thangalaan is scheduled to theatrically release on 26 January 2024 coinciding with Republic Day. In mid December 2023, it was reported that the release of the film was postponed from 26 January 2024, as the makers wanted to first screen it in film festivals and release worldwide later.
 The digital streaming rights for the film were purchased by Netflix for ₹35 crore.