Alex Gruenenfelder is an American film director, screenwriter, producer, actor, and stilt walker. Born in Los Angeles, he starred in his first horror feature at age thirteen, as Young Derrick in "The Purgation" (2015) and later received film festival acclaim for directing the slasher short "The Saga of Psycho Girl" (2019). Gruenenfelder's passion for horror also extends beyond the screen, performing on stilts at such haunted attractions as Midsummer Scream, Six Flags Fright Fest, and the Los Angeles Haunted Hayride. He made his feature film directorial debut with the psychological thriller "Little Pet" (2025).