With a seven-year run on the superhero drama "Smallville" (The WB, 2001-06; CW, 2006-11) and a long resume of voice-over gigs as various superheroes, Michael Rosenbaum became one of Hollywood's go-to actors for comic book fare. Prior to his star-making turn as the bald arch-villain Lex Luthor on "Smallville," Rosenbaum found some success performing in teen horror films and sitcoms during the late 1990s, including "Urban Legend" (1998). Though he made strides in the sitcom world as a series regular on "The Tom Show" (The WB, 1997-98) and "Zoe, Duncan, Jack & Jane" (The WB, 1999-2000), Rosenbaum found his niche in 2001 as the complicated and devious Luthor. His natural affinity for comic book subject matter also led to a series of voice-over roles in animated shows like "Teen Titans" (Cartoon Network, 2005-06) and "Justice League" (Cartoon Network, 2001-06). Though Rosenbaum left "Smallville" in 2008 to pursue other interests, he continued to satisfy fans by not abandoning the comic book world that helped make him a star.