Armand Douglas "Armie" Hammer (born August 28, 1986) is an American actor. He is known for his portrayal of the Winklevoss twins in the biographical drama film The Social Network (2010), the title character in the western action film The Lone Ranger (2013), Illya Kuryakin in the action film The Man from U.N.C.L.E. (2015), Mike in the thriller film Mine (2016), the voice role of Jackson Storm in the animated film Cars 3, Oliver in the romantic drama film Call Me by Your Name (both 2017), and Martin D. Ginsburg in On the Basis of Sex (2018).
For his role in The Social Network, Hammer won Toronto Film Critics Association Awards for Best Supporting Actor. For his portrayal of Clyde Tolson in the biographical drama film J. Edgar (2011), he was nominated for a Screen Actors Guild Award. For his role in Call Me by Your Name, he received acclaim from critics and nominations for the Critics' Choice Award, Independent Spirit Award, and Golden Globe for Best Supporting Actor. Hammer is the great-grandson of businessman Armand Hammer.