John O'Byrne was born on May 3, 1931 in Killiney, Dún Laoghaire-Rathdown, Ireland. He was an actor, known for Die Agatha Christie-Stunde (1982), Quincy's Quest (1979) and The Upchat Line (1977). He died on February 11, 2017 in Lambeth, London, England, UK.