Marteen Estevez (born April 6, 2001), better known mononymously as Marteen, is an American singer, songwriter, and actor. Record producer J. R. Rotem discovered Marteen and has produced many of his songs. In 2022 Marteen made his film debut in Halloween Ends. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2025년 기이한 이야기에서 Joey 역을 맡았다. 2022년 할로윈 엔드에서 Billy 역을 맡았다.