Malewana was born on June 13, 1947 in Ratnapura, Sri Lanka and attended St. Joseph's College, Colombo. He is married to Swarnamali and the couple has one son and one daughter.

 

Upon leaving school, he met Clarence Wijewardena, and the two formed the group Moonstones in 1966. In the early 1960s, the Moonstones began performing songs composed by Wijewardena and sung by Malewana. Their first hit was Mango Nanda, a song written about the maid who once worked at the home of Clarence's wife in the early days of their relationship.

 

The Moonstones were managed by the advertising man Sri Sangabo Corea and were mentored by the Radio Ceylon broadcaster Vernon Corea and his cousin Vijaya Corea. They first featured on a program called "Saturday Star" on Radio Ceylon. Their music was featured for the very first time on the English Services of Radio Ceylon and subsequently the Sri Lanka Broadcasting Corporation. They became household names as a result of the airplay on Radio Ceylon throughout the 1960s. After few years, Wijewardena formed "Golden Chimes" and left "The Moonstones". However, later all reunited again and formed the band "Super Golden Chimes". The band produced many popular songs such as Udarata Niliya and Gamen liyumak.

 

During the 1960s, 1970s, and 1980s, the songs of the 'Moonstones' and the 'Super Golden Chimes' were on the top of popularity. His songs topped the charts on both the English Service and the Sinhala Service on Radio Ceylon for decades. In 1977, he got a job at a Private company and temporarily left the band.

 

Malewana and Wijewardena remained friends and reunited in the 1970s to form a group dubbed the Super Golden Chimes - this group would, similarly, produce a string of popular songs that included Udarata Niliya, Sihina Pathum, Wana Bambaro, and Sathuta Senasuma. The Super Golden Chimes performed for another eight years until, in 1978, Malewana married, and announced his retirement from music. Despite his retirement, Malewana returned in 1988 as a solo artist, and continued to record songs particularly for CDs released in Sri Lanka. In 2005 he formed the band Annesley & The Super Chimes. His song Kageda Gon Wassa was censored between 1970 and 1977 by the prevailed government because people started hinting at the government with this song. In 1984, he made playback singing with the film Shirani directed by M. H. Gafoor.