Creatures Inc. Ltd is a prosthetics effects company based in London, U.K., which focuses on the manufacture of synthetic prosthetics, costume suits, make-up effects, animatronics, and other props. The company was founded by Conor O'Sullivan, and it had twenty years of experience in the film industry by the time Game of Thrones began in 2011. Creatures Inc. Ltd has previously provided prosthetics and makeup work on Prometheus, X-Men: First Class, The Dark Knight, The Tudors (TV series), The Last Samurai, Clash of the Titans and its sequel Wrath of the Titans.