Michael Rosenbaum (born July 11, 1972) is an American actor and director. He is best known for portraying Lex Luthor on Smallville and Flash in the DC animated universe.
(Although Jesse Eisenberg was somewhat redeemed in Justice League, I'm still not a fan of his performance in Batman v Superman and it still makes him look miscast so I took to picking actors that would've been much better choices for Lex Luthor.)
