The trio will once again hit the stage together to introduce a never-before-seen scene from Eclipse. They did the same for New Moon at last year's Movie Awards and MTV's Video Music Awards in September.
The first Twilight flick swept last year's Movie Awards with wins for best movie, best female performance, breakthrough performance (male), best kiss and best fight, and this year New Moon is nominated in five categories.
No word yet if they'll be walking the red carpet or sitting together in the audience.
Hosted by funnyman Aziz Ansari, MTV's golden popcorn trophies will be handed out during a live telecast on June 6 from the Gibson Amphitheatre in Universal City, Calif. Previously announced presenters include Tom Cruise, Cameron Diaz, Zac Efron, Vanessa Hudgens, Jonah Hill, Jessica Biel, Anna Kendrick, Olympian Shaun White and Sean "Diddy" Combs.
Less than a week later, Pattinson, Stewart and Lautner will take part in a panel discussion at a Twilight fan convention in Los Angeles on June 12. Organizers have already warned that they will not be available for autographs or photo ops because of "scheduling."