Watson, 22, grew up starring in the Harry Potter movie franchise and was recently seen in the Oscar-nominated film "My Week with Marilyn."
Asked about Internet buzz saying she may star in a movie based on "Fifty Shades of Grey," Watson told EW.com: "I haven't read the book, I haven't read a script, nothing.
"There are so many movies you become attached to when I've literally never even received a phone call. It was the same way with 'The Girl with the Dragon Tattoo' -- I never even saw a script," she said, adding some friends and family members asked her about "Grey" after dozens of reports appeared online. "The thing is I'm not going to go out there every time someone attaches me to a film to say no or release a statement."
E.L. James, the author of "Fifty Shades of Grey," has described her erotic novel as a love story with "quite a lot of sex in it."