His mother, Lalitha Indrani Weththasinghe, is a housewife born in Colombo who moved to Galle after marrying his father, E.V.G Somasiri, in the 1970s.
[9][10] His school drama performances started in grade 1, where he acted in a comedic street play, Mahadana Muththa.
At the age of fourteen, he appeared in other stage dramas at the school, including ten English plays, for example Julius Caesar.
Pubudu organized his own theater group when he was in grade 12 and carried out his own theatrical productions, such as Miriguwa and Histhanak.
[11] Pubudu became popular, landing recurring roles in TV series such as the soap opera Sara (2006).
He also won award for tele drama Kanyawi and nominated several times as the most popular actor in TV.
[13] He has been nominated for best actors awards several times, and won the Best Actor (2012) in The Derana Lux Film awards for his performance in the movie Challenges in 2011[14] for the character Ranuk, a teenager who is facing the challenges of becoming an adult, directed by Udayakantha Warnasuriya.
[11] Chathuranga has also been awarded Best Actor in a negative role in 2018 for his performance in the film Sakkarang directed by a veteran director Dharmasena Pathiraja.