Sethu Vinayagam (18 August 1949 – 20 September 2009) was an Indian actor who worked in Tamil films and plays.
His notable movies such as Thillu Mullu, Puthiya Theerpu, Oor Kavalan, Sathya, Mangai Oru Gangai, Penmani Aval Kanmani, Palaivana Paravaigal,Guna, He has played one of Rajinikanth's friends in a small scene in the movie Thillumullu.
He also played a small villain role in the movie "Baashha".
Sethu Vinayagam has a wife and 3 daughters.
Sethu Vinayagam died on 20 September 2009 at the age of 60 due to prolonged sickness.