Mark Longwood is an English adult performer born on September 21, 1979, in the United Kingdom. He entered the adult entertainment industry in 2012 at around 33 years old and remained active through 2025. Identified as Black, he is known for his black hair and medium-tall build, standing approximately 5 feet 10 inches (178 cm) tall. Over the course of his career he has appeared under several aliases including Dion Black, Long Wood, Longwood, Mr Longwood, and Mr. Longwood. Longwood has appeared in numerous adult video productions and has maintained a presence on social media and digital creator platforms where he promotes and distributes his work.