His favorite movie was the 1948 feature film The Treasure of Sierra Madre. He was also influenced by 1939 film Gunga Din.
On Trackdown he carried a Smith & Western New Model No. 3 "Russian" .44 instead of the Colt 45 typically used by western stars.
In 1956 he won the first Obie award ever given for best actor for his role as He in an off Broadway performance of the classic play He Who Gets Slapped.
He was nominated for an Emmy three different times while on I Spy.
His friend Sam Peckinpah offered him the role of Billy Drummond in Ride the High Country.He turned it down and the part was given to James Drury.
He was married five times.
Robert is the father of five children: Joseph, Samantha, Joshua, Jason and Rachel Culp.
Robert is the voice of Dr. Wallace Breen in the popular Half-Life 2 Video Games.
Robert stands six feet, two inches tall.
Robert Culp is the father of Joseph Culp.
It was widely rumored that Robert would have played J.R in the TV show Dallas if Larry Hagman hadn't returned to the series.However in an interview in 2007 he stated that he was never contacted by producers or offered the part.He also said that he would not have accepted the part if it had been offered, as he would have been uncomfortable replacing another actor.
In 2004 Robert starred in the movie The Almost Guys.
Robert: (about his character The Colonel in the 2004 movie The Almost Guys) The role of The Colonel was not exactly written for me or the role that I wanted to play, but he was written like an imbecile or kind of foolish.