Yes, there is a Stephen Boyd connection! Audrey of course loved the city of Rome, and while she was there she visited cast of “Ben-Hur”. Below are pictures form Getty and http://www.archivio.com showing Audrey with Charlton Heston, Stephen Boyd and Haya Hayareet during a cast party in 1958. She also visited the set of “The Fall of the Roman Empire” in 1964 with her then-husband Mel Ferrer, who of course played the nefarious blind counselor Cleander in the movie. Happy Birthday Audrey Hepburn!
Majority of photos below are from http://www.archivioluce.com/