'Twilight' star Ashley Greene says that it was 'only natural' for the cast to develop crushes on each other given how much time they spent together

• "Twilight" star Ashley Greene spoke to Insider about her experience starring in the hit franchise.
• Greene said it was "only natural" for the costars to develop romantic feelings for each other.

"Twilight" star Ashley Greene said it made sense that there were crushes among the cast members, given how much time they spent together making the hit vampire movies.

"It's only natural to develop these things," Greene, who starred as Alice Cullen in the "Twilight" films, told Insider. "Being around each other solely four or five years of our life, it's kind of bound to happen and obviously some of them turned into relationships and some of them didn't."

The first "Twilight" film was released in 2008, starring Kristen Stewart as Bella Swan, an ordinary teen who moves to Forks, Washington, and falls in love with vampire Edward Cullen, played by Robert Pattinson.

The movie was directed by Catherine Hardwicke and based on Stephenie Meyer's hit fantasy novel of the same name.

Additional cast members included Taylor Lautner (Jacob Black), Anna Kendrick (Jessica), Jackson Rathbone (Jasper Hale), Nikki Reed (Rosalie Hale), Kellan Lutz (Emmett Cullen), Peter Facinelli (Dr. Carlisle Cullen), and Elizabeth Reaser (Esme Cullen).

The movie became a global success of "Twilight," with devoted fans known as Twihards. The stars also returned for four sequels released between 2009 and 2012, based on Meyer's novels: "New Moon," "Eclipse," "Breaking Dawn: Part 1," and "Breaking Dawn: Part 2."

The "Twilight" films also caused the cast members' popularity to skyrocket to new levels that they had never experienced before.

"We were kind of forced to stop going out at a certain point," Greene told Insider. "We ended up getting together in our hotel rooms and playing music and having drinks and it was a really kind of intense bonding moment for all of us."

"Those were probably some of my fondest memories because we also were able to fully be ourselves behind closed doors with each other," she added. "And then that got a little bit harder as the saga went on, because there was just a lot of eyeballs on us."

The increased attention led to more public scrutiny when it came to their personal lives, too. There were rumored romances as well as Pattinson and Stewart's well-known relationship.

Greene will open up about on-set hookups, her own crushes, and more on her new podcast called "The Twilight Effect" with Kast Media. The first two episodes will be released on March 15, with new episodes dropping weekly.