Arjun Thyagarajan, often credited as T. Arjun, is primarily a Tamil movie producer who made his debut in 2003 with the romantic drama Parthiban Kanavu, which went on to win the Tamil Nadu State Film Award for Best Film.

Associated with the Indian production house Sathya Jyothi Films, founded by G. Thyagarajan and G. Saravanan in the 1980s, Arjun has produced movies such as Em Magan, Jayamkondaan, and Baana Kaathadi. In 2016, he produced the Dhanush and Keerthy Suresh-starrer action comedy Thodari, following which he was associated with the spy thriller Vivegam, starring Tamil cinema's Ajith Kumar, popularly known as Thala, alongside Vivek Oberoi, Kajal Aggarwal, and Akshara Haasan in lead roles. His 2019 venture included Viswasam, and his 2020 release was Pattaas.

A film producer with the National Award-winning production house Sathya Jyothi Films, Arjun is known for his contribution to several successful Tamil films, including Em Magan (2006), Jayamkondaan (2008), Baana Kaathadi (2010), Vivegam (2017), Viswasam (2019), Pattaas (2020), Captain Miller (2024), and Thalaivan Thalaivii (2025).