Photo: Kevin Winter/Getty Images

Before the lovers, the films and the fame, one of Shirley's treasured roles was that of big sister to her younger brother, actor Warren Beatty. "When we were kids, I really did protect him," she says. "[And] he always wanted to tag along with me and my girlfriends, but I always said, 'No, no, go home.'"

Today, Shirley says her relationship with Warren is still going strong. "It's terrific," she says. "I see him whenever I'm in California."