Sumathi En Sundari is a 1971 Indian Tamil-language romantic comedy film, directed by C. V. Rajendran. The film stars Sivaji Ganesan and Jayalalithaa. It is a remake of the 1967 Bengali film Nayika Sangbad. The film was released on 14 April 1971.

C. V. Rajendran was an Indian film director and producer who worked in the Tamil, Telugu, Malayalam, Kannada and Hindi film industries. He was a younger brother of famous director C. V. Sridhar.