Thirisoolam (English: Trident) is a 1979 Tamil film directed by K. Vijayan. It has Sivaji Ganesan playing three different roles. The film was Sivaji's last all-time blockbuster and completed a 200-days run at the box office. About 30 million tickets were sold worldwide. This was significant as Tamil Nadu population was 47 million then.The film is a remake of the Kannada film Shankar Guru (1978) that stars Rajkumar, who appears in the triple role.