Jailer is a 2023 Indian Tamil-language action comedy film directed by Nelson Dilipkumar and produced by Kalanithi Maran of Sun Pictures. The film stars Rajinikanth in the lead role, alongside Vinayakan, Ramya Krishnan, Vasanth Ravi, Tamannaah Bhatia, Sunil, Mirnaa Menon, and Yogi Babu in supporting roles. Mohanlal, Shiva Rajkumar, and Jackie Shroff play guest appearances. It revolves around a retired jailer seeking to apprehend an eccentric idol smuggler.
The film was officially announced in February 2022 with the working title Thalaivar 169, being the 169th film of Rajinikanth, while the official title Jailer was announced in June. Principal photography began in August 2022 in Chennai and wrapped in June 2023. The music was composed by Anirudh Ravichander, while the cinematography and editing were handled by Vijay Kartik Kannan and R. Nirmal.
Jailer was released theatrically on 10 August 2023 to positive reviews from critics who praised its screenwriting, direction, characterisation, cast performances, and background score and became the first highest-grossing Tamil films of 2023 and second highest-grossing Tamil film and one of the highest-grossing Indian film of 2023 and worldwide.