O'Sullivan was one of many starlets considered for the pivotal role of Melanie.
Hitchcock's producer Herbert Coleman, not interested in Janet Leigh for the role of "Marion Crane," preferred the beautiful O'Sullivan.
In the re-shot version of Woody Allen's film drama, Maureen O'Sullivan, Charles Durning and Sam Shepard were replaced by Elaine Stritch, Denholm Elliott and Sam Waterston respectively.
Did you know that Maureen O'Sullivan was not the only choice for this movie? (click to learn more)