The cover of Time magazine once proclaimed Liv Ullmann “Hollywood’s new Nordic star,” a designation that never sat well with the Norwegian actress. She was a committed performer, starring in some of Ingmar Bergman’s greatest films of the Sixties and Seventies. She was an accomplished director, with a résumé that includes the Bergman-scripted 2000 gem Faithless. She became a vocal humanitarian, traveling to hardscrabble parts of the world as a Unicef ambassador. But a star? “I never became a star,” Ullmann tells Rolling Stone in a recent interview to...