- A noted L.A. based acting teacher and coach in later years, his students included Nick Nolte, Forest Whitaker, Jimmy Smits, Lou Diamond Phillips, Pam Dawber, Christopher McDonald and Bonnie Bedelia.
- Appeared in more than 200 TV commercials.
- Attended St. Peter's Elementary School and Plattsburgh High School, and received his B.A. degree from Plattsburgh State, now known as the State University of New York at Plattsburgh.
- Retired from acting in the 1990s to care for his sister, Henrietta Bouyea, who was in declining health.
- He studied acting under Stella Adler and dance with Martha Graham. He later starred on Broadway opposite Vivien Leigh in "Duel of Angels" during the late 1950s.
- Served in the United States Army before becoming an elementary school teacher.
- Was married only once. His only son, Sean Kevin O'Byrne, died as a child.
- His Irish parents were Elmer and Bessie M. Ducatte O'Byrne.
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