Ruj Ronapop (Thai:  รุจน์ รณภพ) is an actor, screenwriter and director, born in Nakhon Si Thammarat Province, Thailand. He directed over 30 films and acted in more than 50 films. He is well known for directing romance movies, such as the Sunset at Chaopraya (1988), Louie (1977) and Phairak Soom Suang (1975).