Marcus Ryan, also known as Kory Houston, is an American gay adult film performer who rose to prominence in the mid-2010s. Active primarily between 2015 and 2017, he appeared in numerous gay porn productions for studios including Masonic Boys, showcasing his versatile performances. Of white ethnicity with blonde hair and blue eyes, Ryan stands about 5 feet 7 inches to 5 feet 10 inches tall. He has also worked as an escort and maintains a strong online presence through Twitter (@MarcusRyanXXX) and fan platforms like JustFor.Fans. In 2023, Ryan publicly shared that he suffers from a genetic eye disease causing progressive vision loss, rendering him legally blind, yet he continues creating content and connecting with fans. His career reflects resilience in the adult industry amid personal challenges.