Breaking Dawn - Part 1 centres on the marriage of Edward and Bella and their efforts to shield their unborn child from the Quileute and the Volturi clans.
Stewart recently revealed that she experienced her "end-of-Bella moment" when filming a honeymoon scene in the Virgin Islands.
"After that scene, my true final scene, I felt like I could shoot up into the night sky and every pore of my body would shoot light," she said. "I felt lighter than I've ever felt in my life."
The Twilight Saga: Breaking Dawn - Part 1 will open in cinemas this November.
Watch the teaser trailer for Breaking Dawn - Part 1 below: