Adam Horowitz (born December 4, 1971) is an American screenwriter and producer. He is known for his work with writing partner Edward Kitsis on Felicity, Black Sash, One Tree Hill, Popular, Fantasy Island, Birds of Prey, Life As We Know It and Lost. His most recent series was the ABC fantasy Once Upon a Time, which he and Kitsis created. Days after it completed a seven season run, the duo was announced as showrunners for Apple TV's Amazing Stories reboot.