The actress -- who shaved her head for her role in Mad Max: Fury Road -- clung tight to her pride and joy while exiting a doctor's office in Beverly Hills. "I'm absolutely foaming at the mouth with Game of Thrones," Theron tells Us. "When my son came in to my life that was our bottle feeds because I couldn't watch television and I slept so little. . . And my mom was like, 'Do you think it's fine that you're feeding your son while there's sword fights?' I was like, 'It's fine, mom. It's fine.'"