Somi Nanda Ratnayake (born October 27, 1946, as ) [Sinhala]), also known as Somi Ratnayake, is a Sri Lankan actor in Sri Lankan cinema, stage drama and television. A highly versatile actor with a career spanning more than four decades, Rathnayake is a multi-talented personnel also working as a script writer and film producer.
He directed the stage drama Ran Salakunu.
Rathnayake started his film career with 1975 film Amaraneeya Adare directed by Dayananda Jayawardane. Then he contributed to several critically acclaimed films such as Suddilage Kathawa, Surabidena, Sathkampa, and Parawarthana.