Nidahase Piya DS (Father of Independence) is a 2018 Sri Lankan Sinhala biographical film directed by Suneth Malinga Lokuhewa and co-produced by Wijeyadasa Rajapakshe, Dilman Jayaratne, Channa Hettiarachchi, Rajaputhra Weerasinghe, Kithsiri Athulathmudali and Clarance Kumarage. It stars an ensemble cast of many popular actors, with Lakshman Mendis in the lead role, with Thumindu Dodantenna and Saranga Disasekara in supportive roles. Music composed by Samantha Perera. It is the 1313th Sri Lankan film in the Sinhala cinema.

The film revolves around the life of Sri Lanka's first prime minister, D.S. Senanayake, who is known as the "Father of the Nation". The film trailer and the theme song were released on 4 February 2018, the 70th anniversary of the country's independence. A private screening of the film was held for the family relatives of D.S. Senanayake, which was organised by the director.

Prior to screening in Sri Lanka, the film has scheduled to screen in several other countries such as Australia, New Zealand and Canada with the participation of Sri Lankans living there.

The film was shot in Ranminitenna cinema village, Meerigama and places around Kandy, Peradeniya and Bogambara prison.