Villu (transl. Bow) is a 2009 Indian Tamil-language action comedy film directed by Prabhu Deva and produced by Ayngaran International. The film stars Vijay in the main dual lead role as father and son alongside Nayanthara, Prakash Raj, Vadivelu, Manoj K. Jayan, Devaraj, Anandaraj, Sriman. Mumaith Khan, Zabyn Khan, and Khushbu appear as item numbers. It is partly based on the Hindi-language 1998 film Soldier, directed by Abbas–Mustan. The film follows Pugazh, an undercover police officer, who avenges the death of his father who was an honest army officer falsely accused and killed by corrupt army officers.

The film was officially announced in December 2007 under the initial title Pugazh, which was later changed to Singam, which was later changed to Vill after Deva received a copyright notice from Hari, which was soon after changed and finalised to be Villu after a negotiation with S. J. Suryah. Principal photography commenced in June 2008. It was sporadically in several legs, with filming locations including Palani, Karaikudi and Bangkok. The film has music composed by Devi Sri Prasad, cinematography handled by Ravi Varman and editing by Kola Bhaskar.

Villu was released worldwide on 12 January 2009 in the theatres to negative reviews from critics and became an average at the domestic box office. The film acquired #221 spot in 2009 at the United Kingdom box office and collected well overseas. Villu settled to an overall domestic profit of ₹50 lakhs.

Rediff pointed out that, Vadivelu and Vijay were applauded for their style of slap-stick humor in the film. Media outlets reported that, the film Villu became an average domestic venture as Vijay and Vadivelu comic-timing was the only saving grace of the film, since the screenplay, dialogues and dubbing were extremely ordinary.

A re-edited comical 4K version of Villu with very less serious scenes was scheduled to re-release worldwide in theatres on June 21, 2024. Vadivelu's version of My name is Billa song will be included in the re-release.