Zoe Saldaña sits down with ET's Denny Directo to discuss her new film, 'Avatar: Fire and Ash,' which hits theaters on Dec. 19. The Oscar winner reflects on how her life and career have changed since accepting her role in the first film nearly two decades ago. Since then, she's become a mom three times over, but reveals to ET, her sons still have not seen any of the movies. She describes why she is still so grateful to work with James Cameron on this series, and explains why the motion-capture technology he uses allows her to make her 'most empowering' work to date.