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Emma Watson is one of the top names being bandied about in Hollywood to portray Anastasia Steele in a big-screen adaptation of Fifty Shades of Grey, and the former Harry Potter star reveals a shocking secret about her connection to the sultry bestseller.

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Pics: Dream Casting: '50 Shades of Grey'

"I haven't read the book -- so I don't know what I would be signing myself up for," she admitted at the premiere of her new coming-of-age film The Perks of Being a Wallflower. "So I would have to get sent a script, I guess. But it's always flattering that people are thinking about you for roles and you are in the mix for things, so it's great."

In addition to Watson, Amanda Seyfried, Emma Stone, Emmy Rossum and Lucy Hale are just a few of the names among the many actresses rumored to be in the running for the erotic tale, for which many have pegged either Ryan Gosling or Man of Steel star Henry Cavill as the hottest man favored to portray Christian Grey.

Watson was just at the Toronto International Film festival to promote her project, and she talked about what it was like hanging out with A-listers Jennifer Lawrence and Kristen Stewart, forming a girl-power trio to be reckoned with.

"It was really nice," reported Watson. "I mean, there is always all these rumors that actresses have so much rivalry and, you know, that we don't get on or anything. We all sat around eating food, we were all starving, and just having a drink and just talking about how crazy it all is, which was just nice really."

Related: Elizabeth Olsen Denies '50 Shades' Casting

Of her new film, The Perks of Being a Wallflower, in theaters September 21, Watson said, "I think there is so much high school coming-of-age stuff, but this one really feels authentic and it really feels real and it really feels like it speaks to what the experience is actually about. And the cast is awesome. And it is funny, but deeply sad, all at the same time. I don't know, it's kind of great. I'm really proud of it."