In 1934, a friend brought fledgling actress Vivien Leigh to see "Theatre Royal," where she would first lay eyes on Laurence Olivier in his brilliant performance as Anthony Cavendish. That night, she confided to a friend that he was the man she was going to marry. There was just one problem: she was already married --- and so was he. TRULY, MADLY is the biography of a marriage, a love affair that still captivates millions, even decades after both actors' deaths. Vivien and Larry seemed to have it all. Yet, in their own minds, they were doomed, blighted by her long-undiagnosed mental illness, which transformed their relationship from the stuff of dreams into a living nightmare.