Around 1947, Aloy was approached by South Indian producer S. M. Nayagam to turn his popular play Kadawunu Poronduwa into a movie.
[3][1] Aloy subsequently oversaw the adaption of a couple of his other plays before trying his hand at directing with Hadisi Vinischaya (with Mabel Blythe taking over for Jemini Kantha) in 1949.
Due to the infancy of the film industry, BAW managed to dominate box office with minimal competition over the following years.
[3][1] Aloy had one of his biggest hits with Kele Handa in 1953; it made Sri Lankan film history as the first direct literary adaption and introduced actress Rita Ratnayake.
His subsequent films include Iranganie (1954), Mathabedaya (1955, introducing actress Ruby de Mel), Daiva Vipakaya (1956), Wanaliya (1958), Hadisi Vivahaya (1959), Kawata Andare (1960), Jeewithe Pujawe (1961), Mangalika (1963) and Magul Poruwa (1967).