At the young age of 15, Dakota Fanning has already worked with acting greats like Robert De Niro, Tom Cruise and Sean Penn, but the acclaimed actress says she joined the much younger and newer cast of 'The Twilight Saga: New Moon' to be a part of the "phenomenon."

"I read all four Twilight books in one week," the actress -- who plays Volturi vampire Jane in the movies -- tells Teen Vogue. "It's such a phenomenon, and I wanted to be able to say that I was a part of it."

Dakota made friends on set, starting with 'Twilight' leading lady Kristen Stewart. The young actresses also star in the biopic about teenage girl band 'The Runaways' that is set to be released some time next year. "We became really close," Dakota tells the magazine of her friendship with Kristen, "like we'd known each other for our whole lives. We talk all the time."

Despite their off-set friendship, the girls are at odds with each other in the 'Twilight' series. "I've never been such an evil character, and because I do know Kristen so well, being mean to her was really weird. It's like, 'Sorry, dude!'"

Dakota and Kristen share the big screen when 'New Moon' rises Nov. 20.