Natouch Siripongthon(in Thai: ณธัช ศิริพงษ์ธร), also known as Fluke, is a Thai actor. He is best known for his roles in Grean Fictions (2013), My Bromance (2014), and Until We Meet Again (TV series) (2019).

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Natouch Siripongthon was born on June 1, 1996. He graduated from Dhurakij Pundit University with a bachelor's degree in the Faculty of Arts. He is currently^[when?] studying for a master's degree at Chulalongkorn University.^[1] He is openly gay.^[2]

His first major film was Grean Fictions, released in 2013 and shot in Chiang Mai—the film was cast with young actors of the region. He was noted for his performance in Grean Fictions, which landed him the starring role in the film My Bromance^[3] in 2014, where he plays a young man who falls in love with his new stepfather's son. With the positive reception of the film, Fluke became one of the young Thai actors better known abroad. In 2015, Fluke starred in Tanwarin Sukkhapisit's film Red Wine In The Dark Night as an innocent young man who encounters an amnesiac vampire.^[4][5]

He performed as Pharm in Until We Meet Again (TV series) (Archived 2021-08-15 at the Wayback Machine), released in 2019, where he plays a reborn man who committed suicide together with his male lover due to love rejection from his lover's parents. This is based on the book, The Red Thread by Lazy Sheep.^[6]