Maanaadu (transl. Public Conference) is a 2021 Indian Tamil-language science fiction action thriller film written and directed by Venkat Prabhu and produced by Suresh Kamatchi. The film stars Silambarasan, S. J. Suryah and Kalyani Priyadarshan alongside S. A. Chandrasekhar, Y. G. Mahendran, Karunakaran, Premgi Amaren, Aravind Akash and Anjena Kirti in supporting roles. The film's music and score is composed by Yuvan Shankar Raja, with cinematography handled by Richard M. Nathan and editing done by Praveen K. L (in his 100th film). It revolves around an NRI and a police officer, who are trapped in a time loop, at the day of a public conference of the chief minister and forced to live the same day over and over again.

The project was announced in July 2018, marking Prabhu's maiden collaboration with Silambarasan. During the extensive pre-production work, the producer ousted Silambarasan from the project in August 2019, citing his unprofessional behaviour, and the latter announced another project under the title Maghaa Maanaadu in that month, which he had dropped. The issue was resolved in November 2019, after Silambarasan agreed to allot his dates for the film.Filming began on 19 February 2020 at Chennai, following a preliminary announcement about the cast and crew. Despite shooting being affected twice due to the restrictions followed during the first and second wave of the COVID-19 pandemic, the makers wrapped the shooting of the film within July 2021, taking only 68 working days for shooting. It was filmed extensively in Chennai, with sporadic schedules taking place in Pondicherry, Yercaud and Hosur.

Maanaadu was theatrically released worldwide on 25 November 2021. It received positive reviews from critics. The film was highlighted for the integration of the time-loop concept with commercial elements, with many publications calling it one of the best Tamil films of 2021. It was declared as critically and commercially successful at the box office. A sequel is confirmed by Venkat Prabhu with the main cast returning.