The women of Rob Pattinson's onscreen adopted vampire family talk about how the actors are a family offscreen as well.

ET's Samantha Harris sits down with Nikki Reed (Rosalie Hale), Ashley Greene (Alice Cullen), and Elizabeth Reaser (Cullen mom Esme).

"It is like a family you know, even in the sense even if we irritate each other," Elizabeth says.

"There are so many people, and so many different personalities, for whatever reason, but they all sort of mesh," Ashley chimes in.

The women say that things got a little hairy for them while the cast was all staying together in an apartment complex in Vancouver during filming. Nikki explains that since fans and media knew where they were staying: "There were times that we were too afraid to leave the house. Not because people are scary, but you create this weird complex. You become agoraphobic, I think a little bit."

But shooting in Italy was wonderful, according to Ashley, the only woman of the three who filmed on 'New Moon''s Italian set.

"We were only there for a week but it was still incredible," Ashley tells ET. "I went to Siena. … We were staying at this amazing bed and breakfast, it was like seven villas and the people that hosted it would cook us these massive breakfasts, massive lunches, massive dinners, so everyone would get off set and come to where we were staying and we would have these big family dinners, so that was fun. Lots of food, lots of wine, it was fun."

For more, watch the video, and check out pics from the set of 'New Moon.' Come back tomorrow to see ET's extended interview with 'New Moon' director Chris Weitz and come back every weekday until 'New Moon' premieres in theaters on Friday, November 20 to see a new ET video with the cast!