Garth Marenghi is a fictional character created by British comedians Matthew Holness and Richard Ayoade. He is portrayed as a horror author and filmmaker, known for his over-the-top personality and self-proclaimed genius. The character is the star of the television series Garth Marenghi's Darkplace, which parodies low-budget horror shows from the 1980s. The series features Marenghi as the lead actor in a fictional hospital set in the 1980s, where bizarre and supernatural events occur. It combines elements of comedy and horror, showcasing Marenghi's exaggerated confidence and the absurdity of the show's production.