Dix was born in Los Angeles, California, the son of actor Richard Dix. As a teenager, he left home after his mother remarried.^[1]

Dix initially was billed as Bob Brimmer, using his legal name. For a year, he worked with the National Academy of Theater Arts in New York City. Following that experience, he gained a two-year contract with Metro-Goldwyn-Mayer.^[1] He later appeared in Forbidden Planet (1956), Forty Guns (1957), and other films including a lead role in Maury Dexter's Air Patrol.^[2] In the 1960's he appeared in a string of b-movies by Al Adamson including Hell's Bloody Devils, Satan's Sadists, Blood of Dracula's Castle, and Five Bloody Graves. His last role was a doomed agent in Roger Moore's first James Bond Feature, Live And Let Die, being killed before the opening credits during a marching New Orleans funeral that turns out to be his own.

On May 31, 1956, Dix married actress Janet Lake in Las Vegas. They divorced in 1959.^[3] Later he was married to Anna May Slaughter, a nightclub singer,^[4] and Darlene Lucht.^[5] Dix owned a home near Demuth Park in Palm Springs, California.^[6] He died of respiratory failure at a hospital in Tucson, Arizona, at age 83.^[2][7] He was buried at the Russellville–Dragoon Cemetery in Cochise County, Arizona.^{[citation needed]}

In 1961, Dix played the part of Jamie, a lieutenant in the US Cavalry on the television program Gunsmoke and later that same year as “Spotted Wolf”, a love torn Indian hunted by the Cavalry in the S7E10 “Indian Ford”.

• Robert Dix at IMDb