Kaatrinile Varum Geetham () is a 1978 Indian Tamil-language film, directed by S. P. Muthuraman and written by Panchu Arunachalam. The film stars R. Muthuraman and Kavitha. It was released on 26 January 1978.
Mohan loves Kamini but her father kills her after learning about their relationship. Distressed, he goes on a trip where he meets Rosy, a lookalike of his former lover, and falls for her.
The film's plot is based on the prevailing research opinion that seven people in the world are alike. The filming was held at four different states: Tamil Nadu, Kerala, Andhra Pradesh and Karnataka. While filming a song at Mercara, cinematographer Babu realised that the sun could not be seen and shoot could not be cancelled as most of the crew turned up on the sets. Since most of the place was foggy, he decided to shoot the song by showing the actress disappearing in white fog.
The music was composed by Ilaiyaraaja and lyrics were written by Panchu Arunachalam. The film marked the first collaboration between S. P. Muthuraman and Ilaiyaraaja. Voice overlapping technology was used in this film. The song "Oru Vanavil Pole" is set to Yamunakalyani, a Carnatic raga, while "Chithirai Sevvanam" is set to Tilang, a Hindustani raga.
Ananda Vikatan rated the film 45 out of 100. According to S. P. Muthuraman, the film failed at the box-office as audiences could not grasp the concept. Babu said the film failed due to its "complicated story".