Robert Pattison and Kirsten Stewart

Weddings are supposed to be joyous, but for Bella Swan it may lead to her death.

In the trailer for Breaking Dawn, Bella (Kristen Stewart) walks down the aisle to become a Cullen and leave her human life behind. When she and Edward (Robert Pattinson) consummate their first night as newlyweds, things get a little more complicated.

"It's impossible," Bella says as she holds her stomach.

Check our more news on Breaking Dawn

The rest of the promo reveals Bella's hybrid human pregnancy, that Alice (Ashley Greene) can no longer see her future, a very protective Jacob (Taylor Lautner), some angry werewolves and even the Volturri!

Watch the trailer for Twilight Saga: Breaking Dawn Part 1, in theatres Nov. 18: