Magneto is the 'mutant' name of an antagonist, and sometimes protagonist, of Marvel's X-Men line of comics. His real name is Max Eisenhardt, and he's used the alias of Erik Lehnsherr many times, though he is more frequently known simply as Magneto. His mutant name is a reference to his mutant ability: magnetic manipulation. He is the father of POLARIS, Scarlet Witch, and QUICKSILVER. He is portrayed by actors Sir Ian McKellan (older Magneto) and Michael Fassbender (younger Magneto) in Fox's X-Men film series.