"Hopefully, it won't taint it and people will still be able to enjoy the movie," Stewart's costar tells the December/January issue of Seventeen magazine. In mid-July, Stewart, 22, was caught cheating on her on-screen and off-screen boyfriend Robert Pattinson, which devastated Twilight fans.
But Greene, 25, is optimistic that Twi-hards will be able put aside that temporary heartache -- the couple reconciled earlier this fall -- and enjoy the final installment of the franchise.
"I think a lot of people see us as our characters," she says, "I really want them to still be able to do that."
Late last month, Greene suffered her own heartache after splitting from Broadway actor Reeve Carney after 10 months of dating. But the actress, whose famous exes include Joe Jonas and Kings of Leon bassist Jared Followill, has no hard feelings towards her former flames.
"I certainly have [been in love.] I can still love an ex as a person, regardless if the breakup was bad," she says. "I would never wish anything negative on them. It takes more energy to hate them than to wish them well."