Ninety-nine percent of Twi-hards already know what's coming in 'Breaking Dawn, Part One,' but it is still interesting to hear what Robert Pattinson and Kristen Stewart think of their characters' relationship, as well as their impending wedding. "There's just something about marriage that [Bella's] apprehensive about," says Stewart, in a new 'Twilight' behind-the-scenes featurette from Entertainment Tonight. The clip also gives fans a brief look at a fight scene between Edward and Jacob (Taylor Lautner). You can check out the entire video below. 'Breaking Dawn, Part One' hits theaters on Nov. 18.