updated 08/22/2014 AT 6:00 PM ET
•originally published 08/23/2014 AT 7:30 PM ET
The Twilight movie series has wrapped for good – but its spirit lives on in the friendships formed over several movies together.
Both stars travel, move between coasts and take on varied projects, such as Reed’s current directorial project for ESPN, Nine for IX, so it’s a rare moment when they find time to reconnect, the pair told PEOPLE.
“We worked so closely for so long and it’s strange because you become this family unit, and the series ended and you’re pulled [apart],” Reed explained of the cast, which included Robert Pattinson and Kristen Stewart. “You kind of hope that you cross paths, and we all keep in touch like via text or email or whatever, but it’s not often we all get to be together.”
“I heard Nikki Reed is going to be here so I’m excited to see her as well, because we don’t get to see each other too often,” Greene said.
“We’re always working!” Reed said. “I’m really excited to see her too!”
Inside the rooftop party, the pair sat close on a sofa chatting, catching up and laughing as music boomed around them and guests danced and drank cocktails and beer. Nearby, Julianne Hough relaxed on a couch with a male pal sipping Amstel Light.
With Reed’s boyfriend, Ian Somerhalder, nowhere in sight, it was a girls’ night out. Greene came sans boyfriend as well, instead hanging out with CBGB costar Joel David Moore.
With the U.S. Open tournament starting soon, Greene said it was great to have an excuse to connect with old friends.