His 100th film was BASEketball.
He has a doctorate in communication.
His father, Walter, was a radio actor while his mother, Marcella, was a stage actress.
He has been working on his autobiography titled Christ, Shakespeare, Ho Chi Min: As I Knew Them for some years now, but no date has been set for publication.
He currently has a home in Ridgefield, Connecticut.
Politically, he is a moderate Democrat.
He has portrayed Presidents Franklin D. Roosevelt and Harry S. Truman on stage.
Although he was one of the main stars of The Magnificent Seven, he had only sixteen lines in the film.
The California Democratic Party originally wanted him to challenge Ronald Reagan for Governor. Even though Vaughn is a Democrat, and disliked Reagan, he refused and instead stood behind Governor Brown, who lost the election to Reagan. Another possible candidate was Gregory Peck.
He was a close friend of Robert F. Kennedy.
He married Linda Staab on June 29, 1974. They have two adopted children, Cassidy (b. 1975) and Caitlin (b. 1981).
Robert Vaughn: (on being referred to as a television legend) I'm glad that I've lived long enough to reach that status, if indeed I have! People are very nice. They come up, introduce themselves and say, 'You made my childhood'. Although I notice that the women saying that are getting older and older - they are great-grandmothers now!
Robert Vaughn: (about The Magnificent Seven) We were filming for about three months and most of the time we'd sit around playing poker saying what a piece of s**t this movie was going to be because there was no script! Every day at about midnight they'd push something handwritten under the door and it was your script for the next day. We really thought, 'Oh no! This is going to be dreadful' but we were wrong obviously!
Robert Vaughn: My son was about eight years old and 90% of the kids who went to his school were kids of investment bankers so didn't understand what I did for a living. But when Superman III came out, it was, 'Cassidy Vaughn's dad tried to kill Superman!' I'd go to the school plays and the kids were fascinated with me but they were also scared! However, I didn't succeed in killing Superman so that was okay. Cassidy was a hot young thing at school after that. His stock went up 1000% but it would have been a different story if I'd succeeded in doing away with Superman, I'm sure!