Ronald Liss, also credited as Ronnie Liss, was a radio actor who played Robin whenever he appeared on The Adventures of Superman. He also doubled in other juvenile roles in specific serials (notably as thirteen year-old Bucky Taylor in "The Man Without a Face").
Years later, in 1966, Liss wrote the MGM/Leo the Lion record story The Official Adventures of Superman and was heard in the cast. He also reprised his role as Robin for a 1950 Batman spin-off audition record (the equivalent of a radio pilot), but the series failed to sell.