Mark Ryan is a British actor and writer, best known for his roles in film and television. He gained recognition for his performances in the Transformers series, where he voiced the character Lockdown, and in the popular TV series Knightfall, where he played Hugh. In addition to acting, Ryan has a background in stage performance and has worked as a stuntman. He has also contributed to various projects as a writer, showcasing his versatility in the entertainment industry. His work spans multiple genres, making him a notable figure in both film and television.