Eamon Joseph O'Brien (September 10, 1915 – May 9, 1985) was an American actor. In a career spanning nearly four decades, he received an Academy Award, two Golden Globe Awards, and two stars on the Hollywood Walk of Fame. One of the most respected character actors of American cinema, O'Brien gained critical acclaim for his roles in The Barefoot Contessa (1954) and Seven Days in May (1964), the former of which won him an Academy Award for Best Supporting Actor. His other notable films include The Hunchback of Notre Dame (1939), The Killers (1946), A Double Life (1947), White Heat (1949), D.O.A. (1950), The Hitch-Hiker (1953), Julius Caesar (1953), 1984 (1956), The Girl Can't Help It (1956), The Man Who Shot Liberty Valance (1962), Fantastic Voyage (1966), The Wild Bunch (1969), and The Other Side of the Wind (2018).