Actor. He is best remembered for his portrayal of the slick Ralph Douglas in "Gambling House" (1951). After attaining his degree in theatrical arts from the American Academy of Dramatic Arts in New York City, New York, he began his career as a leading man on the Broadway stage. Upon being introduced to director Lloyd Bacon while attending a dinner party at the prestigious Russian Tea Room, he was so impressed by his reddish good looks, slim physique, and articulate voice, that he took notice of his potential and arranged for him to begin a career in the film industry beginning with him appearing under his supervision per a supporting role in "Marked Woman" (1937). From there, he would go on to flourish as a notable character actor appearing in over 125 features; often typecast as husbands, fathers, boyfriends, adventurers, foreigners, immigrants, waiters, chauffeurs, doormen, retail clerks, salesmen, butlers, white-collared workers, bankers, aristocrats, wealthy bachelors, soldiers, sailors, authority figures, cowboys, sheriffs, city slickers, detectives, reporters, gigolos, judges, politicians, lawyers, eccentrics, curmudgeons, neighbors, landlords, and patriarchs. He appeared in such feature films as "Rage in Heaven" (1941), "Broadway" (1942), "So Proudly We Hail!" (1943), "Winged Victory" (1944), "Miss Susie Slang's" (1946), "Philo Vance Returns" (1947), "A Foreign Affair" (1948), "Outpost in Morocco" (1949), "Mystery Submarine" (1950), "Yellow Fin" (1951), "Thunderbirds" (1952), "The Miami Story" (1954), "One Desire" (1955), "Hidden Guns" (1956), "Apache Warrior" (1957), "Why Must I Die?" (1960), "Gunfight at Comanche Creek" (1963), and "Mirage" (1965). On television, he became an even more familiar face appearing in various guest spots on such syndicated sitcoms as "Fireside Theatre," "Racket Squad," "You Are There," "Big Town," "Death Valley Days," "Adventures of the Falcon," "Stories of the Century," "The Ray Milland Show," "Adventures of Superman," "Screen Directors Playhouse," "TV Reader's Digest," "The Gale Storm," "Broken Arrow," "The Silent Service," "December Bride," "Maverick," "Dr. Hudson's Secret Journal," "Studio One," "Trackdown," "Wagon Train," "Bourbon Street Beat," "The DuPont Show with June Allyson," "77 Sunset Strip," "National Velvet," "The Roaring 20's," "Batman," "Petticoat Junction," "The Tammy Grimes Show," and "Green Acres". During his career, he was a member of the Screen Actors Guild, was supportive of the Motion Picture and Television Fund, had been an honorary member of Actors Equity, was a regular parishioner of the Catholic church, had been a member of the Hollywood Democratic Committee, presided as a chairman for his local charters of the American Red Cross and the Boy Scouts, was a vocal instructor for the Pasadena Playhouse, had been a magazine model for the Forbes Agency, and he was the celebrity spokesman for Boston Beans. Upon his 1969 retirement, O'Flynn, who never married nor had any children, spent the remainder of his life being a generous benefactor for several public libraries and state parks, and was involved in charitable and religious ventures, until his death.