The couple have two sons - Rajindra and Janak; and four daughters - Jayamali, Nilika, Manori and Samanthi Antonette.

He along with closest friends H D Wijedasa, Alfred Perera, Samuel Rodrigo and Berty Gunathilaka made the play Iskolayak.

They produced the radio play Vihilu Thahalu, where it was banned as it focused on condemning the politicians of the time.

[2] After the ban, Dias along with Alfred discussed another comedy program, which marked the initiation of popular radio play Vinoda Samaya.

The show became popular along with his fellow actors Berty Gunathilake and Samuel Rodrigo, where they were unofficially dubbed as Raja Thun Kattuwa.

[2] His maiden cinema acting came through 1968 film Abudassa Kale directed by Kumar Wickremasooriya.

He acted in supporting role in the films such as Samaje Sathuro, Binaramali and Maruwa Samaga Wase.