Al Pacino is saying goodbye to the "love of his life," Diane Keaton... As we previously reported, the legendary actress passed away at 79 from pneumonia on October 11. Since the news broke over the weekend, her family, friends, fans, and colleagues have been mourning the tragic loss. However, we hadn't heard from one special person in her life yet. Pacino and Keaton played husband and wife in The Godfather franchise, starting in 1972. The pair became lovers in real life and dated on and off until the late '80s.