T.G. Thyagarajan is an Indian Film producer. He mainly produces Tamil Movies. Thyagarajan is a son of Late T. Govindarajan who was also a film producer. He is the owner of Sathya Jyothi Films which is a production house and film Distribution Company. This company got established in the 1980s in collaboration with G. Saravanan and T.G. Thyagarajan. T.G. did M.B.A. from the United States. He used to work for Satya Movies, a production company of his Father-in-Law earlier. Later on, he established his own production house.

He has produced various movies and TV shows. Some of the films produced under Sathya Jyothi Films banner are Moondram Pirai, Pagal Nilavu, Manithanin Marupakkam, Jeeva, Kizhakku Vasal, Idhayam, Endrum Anbudan, Vedan, Honest Raj, Harichandra, Parthiban Kanavu, Em Magan, Jayamkondaan, Baana Kaathadi, Thodari, Sathriyan, Vivegam, Viswasam, Production No.34, and Production No.35.