Olivia Choong Way Sun (born 13 February 1979) is an environmental activist from Singapore. She founded Green Drinks Singapore, a non-profit movement that actively raises awareness on pertinent environmental issues, and connects businesses, academia, government, media, Non-Governmental Organisations and individuals for knowledge sharing and collaboration opportunities. She also founded a public relations consultancy, Green PR, focusing on environmental small and medium enterprises. 
In 2013, she received the EcoFriend award for her environmental contributions to Singapore.>
In addition, Olivia contributes articles to Eco-Business.com, InTheLoop, LOHASIA, Public House and Green Kampong. She also serves on the board of Avelife, a youth environmental Non-Governmental Organisation.