Lex Luthor holds a very special place in comic books - he's the classic arch-enemy of the most famous and popular superhero of all time, Superman. Having first appeared in 1940's Action Comics #23, Luthor has been a prominent figure in DC comic books - and indeed a thorn in the Man of Steel's side - ever since. With his iconic bald head, the multi-billionaire businessman has used his brain to combat the Kryptonian hero's brawn, often to devastating effect, utilising genius schemes, powerful technology and the services of other powerful villains in a determined attempt to take him down once and for all. Such is Luthor's importance and popularity as a character, he has followed Superman across every form of media - television, movies and video games - and has been portrayed by a number of famous actors, including Gene Hackman, John Shea, Michael Rosenbaum and Kevin Spacey. Jesse Eisenberg is set to take on the role of the famous villain in the new DC Cinematic Universe, with 2016's Batman V Superman: Dawn Of Justice marking his on-screen debut. But before then,ere are ten things you didn't know about Lex Luthor...