Stefan Arngrim (born December 23, 1955), sometimes credited as Stephan Arngrim, is a Canadian actor and former child actor. He is perhaps best known for his role as Barry Lockridge on the Irwin Allen television series Land of the Giants which aired from 1968 to 1970. Arngrim was born in Toronto, Canada, the son of actress Norma MacMillan and Thor Arngrim. He is the elder brother of actress Alison Arngrim.