Thalaivii (transl. Female leader) is a 2021 Indian biographical drama film based on the life of Indian actress-politician J. Jayalalithaa. The film stars Kangana Ranaut as Jayalalithaa, Arvind Swamy as M. G. Ramachandran, Nassar as M. Karunanidhi, Raj Arjun and Samuthirakani as R. M. Veerappan in the Hindi and Tamil versions, respectively. Shot simultaneously in Tamil and Hindi, it is directed by A. L. Vijay and written by Madhan Karky (Tamil) and Rajat Arora (Hindi). The movie is produced by Vishnu Vardhan Induri and Shailesh R Singh of Vibri Motion Pictures and Karma Media And Entertainment respectively. The film also features Nassar, Bhagyashree, Raj Arjun, Madhoo, Thambi Ramaiah, Shamna Kasim and Samuthirakani in supporting roles. The music, background score and the soundtrack for both languages is composed by G. V. Prakash Kumar.

The film was launched officially on Jayalalithaa's birth anniversary on 24 February 2019. Initially the film was titled Thalaivi in Tamil and Jaya in Hindi, but the makers later planned to release it under the title Thalaivi in Hindi as well. Principal shooting began on 10 November 2019 and completed in December 2020. The film release was postponed due to rise in COVID-19 cases and lockdown in Maharashtra. It was later rescheduled to release on 10 September 2021, with the new title Thalaivii.

Made with a budget of ₹100 crore, the film earned ₹4.75 crore in its first week, and was a box office bomb. The film received a mixed response upon release, critics praised Ranaut and Swamy's performances but criticised the screenplay. It received four Filmfare Award nominations, including Best Actress for Ranaut, which was later revoked.