Popsugar Entertainment Hellboy Hellboy 2019 Cast The Cast of the Hellboy Reboot Is Looking Hella Awesome (Yeah, We Said It) 29 March 2019 by Corinne Sullivan View On One Page Photo 9 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Brian Gleeson as Merlin Irish actor Brian Gleeson will portray Merlin, the same ancient and powerful sorcerer from the classic Arthurian legend. Previous Next Start Slideshow HellboyMovie CastingMovies