Prachaya Ruangroj (; born 28 July 1994), nicknamed Singto (), is a Thai actor. He is well known in Thailand for his role as Kongphop in SOTUS released in 2016. Since then, Prachaya has starred in several popular series including He's Coming to Me (2019), Turn Left Turn Right (2020), Baker Boys (2021), Paint with Love (2021), Shadow (2023) and The Ex-Morning (2025).
Prachaya was born in Bangkok, Thailand. He graduated elementary school at Bharat Vidyalaya School. He graduated with learning science & mathematics from the Suankularb Wittayalai School and enrolled at an undergraduate program in agricultural economics at Faculty of Economics, Kasetsart University. He graduated with Bachelor of Communication Arts in Broadcasting and Streaming Media Production from Bangkok University.
Prachaya made his acting debut in 2016 in the Thai BL series called SOTUS where he played the lead role of Kongphop alongside Perawat Sangpotirat (Krist) who played the lead role of Arthit.
In 2017, he once again portrayed the lead role of Kongphop in its sequel SOTUS S, and in 2018, for Our Skyy.
From November 2018 to February 2019, he played the lead role of Earth in Friend Zone.
In 2019, he played the lead role of Med in He's Coming to Me alongside Pawat Chittsawangdee which earned them the "Best Dramatic Scene" award at the 2020 LINE TV Awards.
In 2020, he played the role of Maitee in I'm Tee, Me Too. He also reprises his role as Earth in '.
In April 2021, his contract with GMMTV ended and he has started his own YouTube channel. However he returned to the said agency in 2024.