In a career spanning more than three decades, Gunasekera is considered the greatest villain ever to appear in Sinhala cinema after Dommie Jayawardena at the time.
After school life, he worked as a travel agent of Tram car driver for Trans International and enlisted in the Army during World War II.
[2] His daughter Lankarajini is a talented singer who started her career in Sunen Gokula's 'Sangeetha Sandyawa' program in radio.
[3] He started his acting career as a theater actor where he performed in the popular stage plays Rodi Kella and Samudra Devi produced by Sirisena Wimalaweera.
[3] The film is unique in Sinhala cinema history, as its story and dialogue were written by a Buddhist monk, Ven.
Some of his other popular films include: Daru Duka, Sāraviṭa, Maha Rǣ Hamu Vū Sthriya, Lasanda, Romeō Julieṭ Kathāvak, Veeduru Geval, Baḍuth Ekka Horu, Binaramalī, and Sikuruliyā.