Vedalam (transl. "Phantom") is a 2015 Indian Tamil-language action film directed and co-written by Siva. It stars Ajith Kumar and Lakshmi Menon while Shruti Hassan, Ashwin Kakumanu, Rahul Dev, Thambi Ramaiah, Kabir Duhan Singh, and Soori play supporting roles. The film features music composed by Anirudh Ravichander, while the cinematography and editing were done by Vetri and Ruben.

The project was announced in mid-2014 after the success of Ajith and Siva's previous collaboration, Veeram, where in October 2014, Rathnam was announced to lead the production. The team underwent significant changes with the film's cast and crew, and the completion of Kumar's other film, Yennai Arindhaal, delayed the film's production. The principal photography of the film began on 9 April 2015, with filming taking place in major portions across Kolkata, and also in Chennai and Milan, Italy, and was completed that October. The film began production under the working title Thala 56, before Vedalam was officially announced in September 2015.

Vedalam was released worldwide on 10 November 2015 coinciding with Diwali to generally positive reviews from critics. The film grossed around ₹120–150 crore at the box office upon its release and was a profitable venture for the traders and exhibitors. It was remade in Bengali as Sultan: The Saviour in 2018 and in Telugu as Bhola Shankar in 2023.