Last week, the Breaking Dawn actress was at Macy's for her DKNY campaign as she is the new face of the brand.
Greene told People: "It's certainly something that I've read and people have voiced that they do consider me one of their fashion icons, and it's really flattering and I'm really thankful for it.
"But it's always interesting to me - growing up in Jacksonville, Florida, I never considered myself a fashion icon at all, or anything even close."
Greene also revealed that she moved away from wearing "unfashionable" items to paying attention to her style while acting on the first Twilight film.
"All of a sudden there were carpets and events and press tours," she explained. "And I got to work with people on set about creating [character Alice Cullen's] look, so that sparked my interest and it spiralled from there. I fell in love with it."
Next up for Greene is the role of a young fashion designer in her ABC pilot Americana, with Sex and the City's Patricia Field attached as the show's costume designer.
Watch the trailer for The Twilight Saga: Breaking Dawn - Part 2 below: