The League of S.T.E.A.M., a.k.a. the "Steampunk Ghostbusters", is an American performance art troupe from Southern California popular in the steampunk community and specializing in live interactive themed entertainment.

Doug Jones is an American actor, contortionist, and mime artist. He is best known for portraying non-human creatures, usually via heavy make-up and visual effects. He has most notably collaborated with acclaimed filmmaker Guillermo del Toro, appearing in the films Mimic (1997), Hellboy (2004), Pan's Labyrinth (2006), Hellboy II: The Golden Army (2008), Crimson Peak (2015), and The Shape of Water (2017).