Keselgaspe Manatunga Jayalath Manoratne (Sinhala: කෙසෙල්ගස්පේ මනතුංග ජයලත් මනෝරත්න; 12 June 1948 – 12 January 2020) was an actor in Sri Lankan cinema, stage drama and television.

[4] Manoratne was born on 12 June 1948 in Dehipe, Nuwara Eliya as the youngest son in the family of six children.

His father Keselgaspe Manatunga Perera was a lorry driver and his mother Agalakotuwa Herath Mudiyanselage Leela Kumari was a housewife.

[5] At an early age, his music teacher, Sunil Sriyananda, recognised his abilities and encouraged him to take up acting and singing.

[5] After completing his secondary education with Geography, Sinhala and Buddhist Civilization for G.C.E A/L, he attended the University of Peradeniya, where he continued to study drama under the guidance of Professor Ediriweera Sarachchandra.

Manoratne went to Nuwara Eliya Kachcheri to get a job and at that time, he produced remakes of Sarachchandra's plays Raththaran and Elowa Gihin Melowa Awa.

He has acted under all the five major stage drama directors in Sri Lankan history - Sarachchandra, Sugathapala de Silva, Dayananda Gunawardena, Gunasena Galappatty and Henry Jayasena.

He continuously produced plays of many genres in following years including Kaneru Mal (2000), Lokaya Thani Yayak (2005), Makara remake (2007), Sudu Redi Horu (2008), Buruwa Mahaththaya (2012), Sellam Nirindu (2013) and Handa Nihanda (2016).

These eight stage plays were Lokaya Thani Yayak, Sellam Nirindu, Thalamala Pipila, Buruwa Mahaththaya, Guru Tharuwa, Andarela and Puthra Samagama.

In 2005, Manoratne played triple roles for the first time in Sri Lankan teledrama history in a miniplay directed and scripted by himself, titled Thunpath Ratawaka Lassana.

[19] Apart from acting, Manoratne also directed many television serials such as Sekku Gedara, Ransirige Sangramaya, Mage Kaviya Mata Denna, Thunpath Ratawaka Lassana, Eeye Ada Saha Heta and Thaththe Api Awa.

He also directed single episode miniplays such as Bappage Paminima, Aege Awurudda, Raja Thun Kattuwa, Nidahasa, Seettuwa, Denna Demallo, Sathuru Mithuru, Duppathunda Adaraya Karathi, Santhapaya and Buddha Puthra.