John Soursby Glover Jr. (born August 7, 1944) is an American actor, best known for a range of villainous roles in films and television shows, such as Lionel Luthor on the Superman-inspired television series Smallville.

For Disney, he voiced The Babysitter in the Dinosaurs episode "Terrible Twos", Abraxas in Tron: Evolution, and Dyson in Tron: Uprising and played New York Times Reporter in Agent Carter and the Devil in the ABC Studios TV show Perception.