Dario Delacio is an American actor and stunt man/double who acted in the role of Doomsday on the CW television series, Smallville. Dario Delacio is the first actor to play the role of Doomsday in a live action role. Doomsday has been portrayed before on television but only in a voice role on the Justice League animated series, follow up series Justice League Unlimited and the video game Justice League Heroes. Sam Witwer played the role of Doomsday's human counterpart, Davis Bloome.