This reference work details O'Brien's remarkable and varied career on stage, screen, and television: it includes a biography and a complete listing of all her film, radio, stage, and television appearances, as well as references to her in magazines and newspapers. Each entry includes complete production information, as well as reviews and behind-the-scenes commentary. Included are forewords by Robert Young and O'Brien herself, who provided much of the information in this book. Dozens of photos, including many from O'Brien's personal collection, illustrate the text and show the varied stages of a career that includes both famous roles and famous friendships.