It's official: Robert Pattinson, Kristen Stewart, and Taylor Lautner will be at the MTV Movie Awards this Sunday to debut the trailer for Breaking Dawn! MTV just released this amazing sneak peek at the footage they will be presenting, which gives us a peek at Edward and Bella's wedding. Bella the bride has her hair pinned back, and we even get a glimpse at her very handsome groom, Edward Cullen, standing at the end of the aisle. Also recently announced about Sunday's big event: Robert's Water for Elephants costar Reese Witherspoon will be honored with the MTV Generation Award. We'll be live streaming the MTV Movie Awards red carpet and updating from the show, so don't miss it!