A seven-year-old McCullough was one of three actresses narrowed down for the part of five-year-old Robin, and was brought in to screen test with her on-screen parents Finola Hughes (Anna Devane) and Tristan Rogers (Robert Scorpio) [REF].
McCullough debuted on September 6, 1985, and stayed with the series until September 12, 1996 [REF].