Armand Douglas Hammer is an American actor. A son of the businessman Michael Armand Hammer and a great-grandson of the oil tycoon Armand Hammer, he began his acting career with guest appearances in several television series. Hammer's first leading role was as Billy Graham in the 2008 film Billy: The Early Years, and he gained wider recognition for his portrayal of the twins Cameron and Tyler Winklevoss in David Fincher's biographical drama film The Social Network, for which he won the Toronto Film Critics Association Award for Best Supporting Actor. Hammer portrayed Clyde Tolson in the biopic J. Edgar, played the title character in the western The Lone Ranger, and starred as Illya Kuryakin in the action film The Man from U.N.C.L.E.. In 2017, he starred in Luca Guadagnino's romantic drama Call Me by Your Name, for which he received a nomination for the Golden Globe for Best Supporting Actor and a nomination for the Independent Spirit Award for Best Supporting Male.