Robert Viharo (born August 14, 1942) is an American actor. He made an early appearance in 1966 as Harry in Dark Shadows. He is known for his role in Valley of the Dolls (1967) in the part of a Broadway director. He had the starring role as Zachary Kane in the action film Bare Knuckles (1977). He also played the part of Col. Ernesto Dorio in the film Romero (1989).