She was a living legend, a symbol of fierce independence who defied convention to live life on her own terms. He was the greatest screen actor of all time, the personification of the rock-solid American male. During their twenty-six years together, Katharine Hepburn and Spencer Tracy mesmerized the world with their famous on-screen chemistry like no other couple. Yet their private love affair - which ended only with Tracy's death in 1967 - remained shrouded in secrecy. Now, as Hepburn turns ninety, international best-selling author Christopher Andersen draws on his own extensive conversations with Kate - as well as those who knew the legendary duo intimately - to paint the first full, inspiring portrait of these beloved American icons and the life they shared.