Punnagai (Eng: Smile) is a 1971 Indian Tamil-language buddy drama film directed and written by K. Balachander. It is a remake of the Hindi film Satyakam (1969) which starred Dharmendra.
The film stars Gemini Ganesan, R. Muthuraman, Nagesh, M. R. R. Vasu and Jayanthi. It was released on 5 November 1971.
The story is narrated by Rajbabu, who wants to write a book on the life of his friend, Sathya. Sathya, Rajan, Rajbabu, Mandiramoorthi and Haniff are college-mates in Madras.
Directed by – K. Balachander
Screenplay by – K. Balachander
Story by – Narayan Sanyal
Based on Satyakam by Hrishikesh Mukherjee
Produced by – R. Venkatraman, K. Arumugam, H. Nagaraja Rao & S. S. Nachammai
Starring – Gemini Ganesan, R. Muthuraman, Nagesh, M. R. R. Vasu & Jayanthi
Cinematography – N. Balakrishnan
Edited by – N. R. Kittu
Music by – M. S. Viswanathan
Production – Amutham Pictures
Release date – 5 November 1971
Running time – 154 minutes
Country – India
Language – Tamil
