Dakota Fanning admits that it was 'weird' being mean to Kristen Stewart on the set of New Moon because the pair had become good friends during filming.
Fannning has joined the cast for the second story in the Twilight Saga to be adapted for the big screen as Jane, a member of the Volturi.
In an interview with Teen Vogue the actress said: "We became really close, like we'd known each other for our whole lives. We talk all the time.
"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!'."
New Moon looks set to be one of the biggest movies of 2009 as pre-ticket sales have already proved incredibly popular amongst the fans.
Stewart is returning to the franchise in the central character of Bella Swan who is left heartbroken when her vampire lover Edward leaves her.
She finds comfort with old friend Jacob Black but soon discovers that he also has a few secrets of his own.
New Moon is released 20th November.
Tagged in Dakota Fanning Twilight