Win Metawin Opas-iamkajorn is a model and actor with Chinese ancestry born in Bangkok, Thailand. He is the third among four siblings, his youngest brother is an actor named Mick Metas Opas-iamkajorn under GMMTV. He completed his secondary education at Panyarat High School where he had the opportunity to become an international exchange student at Belmond–Klemme Community School District in Iowa, United States. During his time as an exchange student, he became a member of the school band's percussion choir where his group received a superior (Division I) rating. Metawin also passed the General Educational Development (GED) examination upon his graduation. Currently, he is taking up a bachelor's degree in economics (international program) at Thammasat University. Metawin entered the entertainment industry as a trainee actor under ONE31 for about a year before moving to an actor contract under GMMTV. He is known for his acting debut and leading role as Tine in '2gether: The Series' and 'Still 2gether' (both in 2020), which brought him to international prominence. Metawin has a confectionery business "SOURI" which he co-owns with his sister Mintra Opas-iamkajorn.

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