John Soursby Glover, Jr., (born August 7, 1944) is an American actor, known for a range of villainous roles in films and television, including Lionel Luthor on the Superman-inspired television series Smallville. In 1993 he co-starred in the dark comedy Ed and His Dead Mother with Steve Buscemi and Ned Beatty.
Glover began his career in television, playing a mentally disturbed kidnapper who kidnapped Joanne, the heroine on Search for Tomorrow. One of his early film performances was a small but pivotal role as a U.S. diplomat in White Nights. Other notable roles include Alan Raimy in 52 Pick-Up, Bryce Cummings in Scrooged, Daniel Clamp in Gremlins 2: The New Batch, a mobster in Payback, an advertising spokesman in RoboCop 2, Derek Mills in Night of the Running Man, the Riddler in Batman: The Animated Series, Doctor Jason Woodrue in Batman & Robin, Verad in the Star Trek: Deep Space Nine episode "Invasive Procedures", the Devil in the series Brimstone, and a recurring role in The Days and Nights of Molly Dodd as Cousin Jerry, from Bal'mer, a relative whom no one actually seemed to know.
Glover is perhaps best known for the role as Lionel Luthor on Smallville from 2001 to 2008 where he first appeared as a guest actor in the show's first season and then appeared as a full cast member from seasons two to seven. He later returned in 2010 and 2011 for the tenth and final season as a parallel universe version of the character.