have the actors already filmed part 2 already или is everyone gonna get back together to film part 2 of breaking dawn или is it filmed already?

Everything is completely done. It's possible that they may go back and re-shoot some scenes that didn't come out well или add some new scenes if needed, but it's "officially" done shooting.

IDK

They filmed both parts at the same time. A 6 месяц shoot from November 2010 to April 2011. As for now, nothing has been scheduled whether they do reshoots или not.

As of now, the Twilight actors are off doing various projects. Around October and November, promotion for Breaking Dawn will resume. :)