Robert Fuller (born Leonard Leroy Lee, July 29, 1933) is an American horse rancher and retired actor. He began his career on television, guest-starring primarily on Western programs, while appearing in several movies, including: The Brain from Planet Arous; Teenage Thunder (both in 1957); Return of the Seven (1966); Incident at Phantom Hill (1969); and The Hard Ride (1971).

In his five decades of television, Fuller was known for his deep, raspy voice and was familiar to television viewers throughout the 1960s from his co-star roles on the popular 1960s Western series, as Jess Harper, former gunslinger, on Laramie and Cooper Smith on Wagon Train, and was also well known for his starring role as Dr. Kelly Brackett in the 1970s medical/action drama Emergency!