Robert Reed Carradine (born March 24, 1954) is an American actor best known for playing Lewis Skolnick in the Revenge of the Nerds series of comedy films. His Disney roles include Maxwell Dweeb in Totally Minnie, Don Keeble in Max Keeble's Big Move, Sam McGuire in Lizzie McGuire, John Fairfield in the Disney Sunday Movie episode "The Liberators", and Malachi Van Helsing in Mom's Got a Date with a Vampire.