Robert Vaughn in The Man from U.N.C.L.E. (1964)

Robert Vaughn, Keith Bell, and Ian Hendry in The Protectors (1972)

Robert Vaughn, David McCallum, and John Orchard in The Man from U.N.C.L.E. (1964)

Robert Vaughn and John Orchard in The Man from U.N.C.L.E. (1964)

Robert Vaughn, Tiiu Leek, and Henry Ramer in Starship Invasions (1977)

Robert Vaughn in The Young Philadelphians (1959)

Actor Robert Vaughn attends the 2014 Dean Martin Expo & Nostalgic, Comedy & Comic Convention at Holiday Inn on June 28, 2014 in New York City. (Photo by Noam Galai/Getty Images)

Robert Vaughn in Law & Order: Special Victims Unit (1999)

Actor Robert Vaughn attends an event in Los Angeles,CA, circa 1962.

Robert Vaughn and David Selby in Doctor Franken (1980)

Robert Vaughn, Robert Perault, and David Selby in Doctor Franken (1980)

Robert Vaughn and Robert Perault in Doctor Franken (1980)

Charles Bronson, James Coburn, Yul Brynner, Robert Vaughn, Horst Buchholz, and Brad Dexter in The Magnificent Seven (1960)

Robert Vaughn, Hans Christian Blech, and Joachim Hansen in The Bridge at Remagen (1969)

Robert Vaughn, Lara Wendel, and Timothy W. Watts in Zombie 5: Killing Birds (1988)

Robert Vaughn and Annie Ross in Superman III (1983)

Richard Pryor, Robert Vaughn, Annie Ross, and Pamela Stephenson in Superman III (1983)

Kurt Russell and Robert Vaughn in The Man from U.N.C.L.E. (1964)

Robert Vaughn, Judy Parfitt, and Nyree Dawn Porter in The Protectors (1972)

Robert Vaughn and Norma Moore in Unwed Mother (1958)

Robert Vaughn, Tony Anholt, Yasuko Nagazumi, and Nyree Dawn Porter in The Protectors (1972)

Ben Gazzara, George Segal, and Robert Vaughn in The Bridge at Remagen (1969)

Charles Bronson, James Coburn, Steve McQueen, Yul Brynner, Robert Vaughn, Horst Buchholz, and Brad Dexter in The Magnificent Seven (1960)

Robert Vaughn in FDR: That Man in the White House (1978)

George Kennedy and Robert Vaughn in Virus (1980)