Kristen Stewart, Robert Pattinson Get Down and Dirty in Breaking Dawn Trailer

By Alison Schwartz

Sunday June 05, 2011 11:00 PM EDT

It's sure to be the wedding of the year – no offense, Kate Middleton – and Sunday night, Twilight fans got a glimpse of the grand occasion at the MTV Movie Awards.

Just days after a sneak peek of the wedding dress was released, the saga's stars, Kristen Stewart, Robert Pattinson and Taylor Lautner introduced the trailer of Breaking Dawn – Part 1.

PHOTOS: MTV Movie Awards' Star Style!

In the preview, invitations to Bella Swan (Stewart) and Edward Cullen's (Pattinson) wedding begin to trickle out – to the dismay of werewolf Jacob, played by Lautner, who completes the Twilight love triangle.

"You are cordially invited to the event that will change everything," fans are teased in the trailer.

But what about that pillow-biting sex scene?

A quick shot of Pattinson and Stewart getting hot and heavy on their honeymoon in a moment of passion lives up to the actor's promise last year that "it does actually literally get more physical in Breaking Dawn."

At the end of the trailer, Stewart rubs her belly, implying she's pregnant – a plot twist that has already made headlines due to the book's gruesome account of the childbirth scene.

For a complete list of MTV Movie Awards winners, click here.