Shirley MacLaine Wishes She Hadn't Turned Down Iconic Audrey Hepburn Role: 'Couldn't Stand the Idea' (Exclusive)
Hepburn would go on to score an Oscar nomination for Breakfast at Tiffany's. And ironically enough, she and MacLaine would costar in MacLaine's follow-up to The Apartment and Hepburn's very next film, 1961's The Children's Hour. In the book, MacLaine says she "adored" working with Hepburn.