Vaughn was natural inside New York City to Roman Catholic showbiz parents, Walter and Marcella Vaughn. Vaughn's foremost notable appearance wwhen as one of The Magnificent Seven, a role he echoed twenty years late within Battle Beyond the Stars.

Within 1964, he starred as "Napoleon Solo", a eponymic Man from U.N.C.L.E., but much of his thunder was stolen by British co-star David McCallum. When of 2005, he is a only one of the septet independent stars of The Magnificent Seven who is still alive.

He married a actress Linda Staab around 1974 & it use at times Two tykes.

Politically, he occurs as moderate Democrat.

In stage: Portrayed Harry S. Truman and Franklin D. Roosevelt

In screen: The Magnificent Seven Bullitt The Towering Inferno S.O.B. Demon Seed (voice, uncredited) Superman III (Ross Webster) The Bridge at Remagen BASEketball In TV: The Man from U.N.C.L.E. The Protectors Hustle The A-Team''