Lex Luthor is a fictional character from the television series Smallville. He was a series regular from the pilot episode until the season seven finale, and has been played continuously by Michael Rosenbaum, with various actors portraying Lex as a child throughout the series. The character of Lex Luthor, first created for comic books by Jerry Siegel and Joe Shuster in 1940 as archnemesis of Superman, was adapted to television in 2001 by Alfred Gough and Miles Millar — this is only the third time the character has been adapted to a live action television series. The character has also appeared in various literature based on the Smallville television series, none of which directly continues from or into the television episodes.