Question: What is a 2012 Indian Tamil spy thriller film written and directed by A. L. Vijay with music composed by an Indian film score and soundtrack composer who has mainly scored music for Tamil films ?

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Justin Prabhakaran: Justin Prabhakaran is an Indian film score and soundtrack composer.  He has scored music for Tamil films and Malayalam films.  Justin Prabhakaran made his debut as a film composer in the 2014 Tamil film "Pannaiyarum Padminiyum".

Thaandavam: Thaandavam (English: Violent dance) is a 2012 Indian Tamil spy thriller film written and directed by A. L. Vijay, starring Vikram, Jagapati Babu, Anushka Shetty, Amy Jackson and Lakshmi Rai.  It is produced by UTV Motion Pictures and features music composed by G. V. Prakash Kumar.  "Thaandavam" was released worldwide on 28 September 2012.

Adithyan: Adithyan is an Indian film score and soundtrack composer.  He has predominantly scored music for Tamil films apart from working in Telugu and Malayalam films.  He has also sung a few songs for other composers.  Post-music career, he appeared on his television cooking show.

Sirpy: Narayanan, known by his stage name Sirpy (Tamil: சிற்பி ; born 25 May 1962), is an Indian film score and soundtrack composer.  He has predominantly scored music for Tamil films apart from working in Telugu and Malayalam films.  He has also sung a few of his own compositions.

G. V. Prakash Kumar: G. V. Prakash Kumar is an Indian film score and soundtrack composer, actor ,singer .  He has mainly scored music for Tamil films.  His first film was S Pictures' "Veyyil" (2006) and he became popular in Tamil cinema by the early 2010s.  He has ventured into film production and acting.

John Peter (music director): John Peter is an Indian film score and soundtrack composer, who has predominantly scored music for Tamil films.

V. Harikrishna: V. Harikrishna (born 5 November 1974) is an Indian film score and soundtrack composer, playback singer and film producer.  He has mainly scored music for Kannada films.  After his stint as a programmer and assistant musician, Harikrishna made his debut as an independent composer in actor Darshan's first production venture "Jothe Jotheyali" in 2006.  Since then, he has been scoring for majority of Darshan's films besides working for many other leading production houses.  He owns an audio company called "D-Beats" (established: 2013) and produces music under his own company starting from the film "Bulbul" (2013).

Yuvan Shankar Raja: Yuvan Shankar Raja (born 31 August 1979) is an Indian singer-songwriter, film score and soundtrack composer, and occasional lyricist from Chennai, Tamil Nadu.  He has predominantly scored music for Tamil films.  The youngest son of the greatest tamil film composer Ilaiyaraaja, he began his musical career in 1996, at age 16, when he composed the film score for "Aravindhan".  After initial struggle, he made his big break with the "Thulluvadho Ilamai" soundtrack (2001), and evolved as one of Tamil cinema's most sought-after composers by the mid-2000s.

Achu Rajamani: Achu Rajamani, often credited as Achu, is an Indian film score and soundtrack composer and singer.  He has scored music for several Malayalam, Telugu and Tamil films.  He made his full-fledged music direction debut in the Telugu film "Nenu Meeku Telusa...? " in 2008.

Bharani (music director): Bharani is an Indian film score and soundtrack composer.  He has predominantly scored music for Tamil films apart from working in Telugu and Kannada films .  He has also sung few of his own compositions.

Supporting paragraphs: Thaandavam G. V. Prakash Kumar
Answer: Thaandavam