Swaminathan Vaidyanathan (26 June 1904[1]—11 January 1963[2]), known by his stage name Serukulathur Sama, was an Indian stage and film actor who was primarily known for playing the role of the Hindu god Krishna in Tamil language Hindu mythological films of the 1930s and 1940s.

Born in the village Serukalathur in Thiruvarur district to Mirasudar (Manager of own farm) Vaidyanadhaiyer, his birth name was Swaminathan.

There he worked as a clerk for 2 months in the office of the Indian National Congress Party and then for 10 years in the Cosmopolitan Club.

He leased National Movietone Studio on Poonamallee High Road, Chennai and changed its name as Bharat Cinetone.

His first production was Shylock, (Tamilized as Shailak) adapted from Shakespeare's The Merchant Of Venice.