The couple has two sons: Rohana Prema Kumara, Sudesh Wasantha and one daughter, Vasanthika Piyanga Kumuduni.
[4] His son Sudesh Wasantha Pieris is also a filmmaker, actor and playback singer of Sinhala cinema.
[3] He entered Sinhala cinema with a minor uncredited role in Henry Chandrawansa's film Vanagatha Kella.
While acting in the 1973 film Thushara as a stuntman, he informed the director Yasapalitha Nanayakkara about his passion to become a filmmaker.
The first seven films (Obaṭa Divurā Kiyannam, Jaya Apaṭai, Mamai Rajā, Raja Wæḍakārayō, Yukthiyaṭa Væḍa, Dinuma and Obaṭai Priyē Aādarē) directed by Sunil Soma were screened for more than 100 days in a row, a record in Sinhala cinema.
Before the assassination of lead actor Vijaya Kumaratunga in February 1987, the film ran 75 days with less income.
On the final day of screening at Ritz Hall, the film crew donated 10 wheelchairs to commemorate Kumaratunga.
After reaching 100 days, producers Sonia Disa and Sunil T. opened two bank books for Kumaratunga's children, Vimukthi and Yashodara and Rs.
[4] Sunil Soma introduced many actors and actresses to the Sinhala film such as: Anoja Weerasinghe, Anusha Damayanthi, Ruwanthi Mangala, Damith Fonseka, Shashi Wijendra, Arjuna Kamalanath and Anarkali Akarsha.