The actress will star in indie film The Perks of Being a Wallflower, one of her first movie roles after the Harry Potter franchise ends later this year.
Watson filmed her first scenes for the film recently, with the actress unsure of her regional dialect.
"My accent? I was really nervous. I think it sounded terrible!" she told MTV News.
Watson joined the cast of the film, based on the book of the same name by Stephen Chbosky, in February. The plot of the film revolves around a boy dealing with the troubles of adolescence, and Watson is "hopeful" of the film's success.
She added: "It's good. Having been out in Pittsburgh for four weeks - it's okay. It's good. I'm hopeful about it."
Watson recently described filming certain scenes for the upcoming Harry Potter and the Deathly Hallows: Part 2 as "genuinely terrifying".
She also spoke of her belief in old-fashioned romance, saying: "I'm a feminist, but I think that romance has been taken away a bit for my generation."
Watch the trailer for Harry Potter and the Deathly Hallows: Part 2 below: