Chloe Grace Moretz has revealed that she's leaving behind her iconic Hit-Girl role.

Speaking to Digital Spy, the actress said that she doesn't believe Kick-Ass 3 will happen and suggested that piracy resulted in the underwhelming box office performance of last year's sequel.

"Sadly, I think I'm done with the character," Moretz said. "Hit-Girl was a very cool character, but I don't think there will be any more movies. You make these movies for the fanboys, but nowadays everyone seems to pirate them rather than watch them in the movie theatre.

"Kick-Ass 2 was one of the number one pirated movies of the year, but that doesn't help us because we need box office figures. We need to prove to the distributors that we can make money from a third and a fourth movie - but because it didn't do so well, we can't make another one.

"If you want more than one movie, everyone has to go and see movies at the cinema. It's all about the numbers in the theatre."

Moretz added that she is "disappointed" by the number of Hollywood movies that marginalise their female characters.

Universal Pictures

"Whenever there's a female superhero, it's always a more sexual plotline rather than seeing an actual character on screen. I don't think that's cool. I think it's rather sad," she said.

"I would love to change that. Hopefully, there will be some cool female superhero movies in the future. I hear there's a Wonder Woman movie coming up. Hopefully they won't sexualise Wonder Woman, too."

Moretz's latest big screen role is If I Stay, a romantic drama that sees her play a cello protege who falls into a coma after a car accident and, through an out-of-body experience, is faced with the dilemma of waking up with her life drastically changed.

Her character Mia is the daughter of two rockers (Mireille Enos and Joshua Leonard), and plays out her rebellion through classical music. Moretz spent seven months learning to play the cello in preparation, adding that she learned a lot "about the emotionality of the instrument".

Warner Bros Pictures

"The cello definitely made me appreciate music a lot more. It helped me understand the technicality of classical music, and how intricate it really is," she explained.

Unlike her character in If I Stay, Moretz has never been one to act out any kind of rebellion.

"I'm not really a rebel. The thing about me is the fact that my mum is pretty liberal and cool. She doesn't really enforce things with me, so I don't feel like rebelling," she stated.

"It's been ingrained into me that I don't need to rebel, so I haven't done anything crazy really. Maybe one day I'll have an epiphany and I'll do all the rebelling I need - but not for now."

If I Stay is based on the best-selling novel from Gayle Forman, and Moretz also has roles lined up in two more book adaptations: Dark Places (from Gone Girl author Gillian Flynn) and Young Adult hit The Fifth Wave (penned by Rick Yancey).

The latter is the first instalment in what could be a fresh new YA trilogy. The film will debut in January 2016, while the second book in the series, The Infinite Sea, will debut in September.

Moretz said that The Fifth Wave will stand out from films like The Hunger Games and Divergent because of its strong focus on family.

"The girl I play Cassie loses her entire family, except for her little brother, but she has to fight and struggle to find him again because she has no-one left in her life.

"That's what's different to those other movies; this is less about a boy and more about a little brother. It's about family, which is a theme I love."

Penguin Books

Moretz also revealed that she actively looks at comic books and novels for potential film roles in the future.

"I try to keep abreast on what's out there and what's being made," she said. "We're getting a lot of source material from books and comics right now, so it's a great place to look."

Her dream book-to-screen adaptation would be The Bell Jar, Sylvia Plath's roman Ã clef about a woman who spirals into depression over a summer interning at a New York magazine company.

"It's incredibly progressive," Moretz said of poet Plath's only novel. "I think it's a book that you could do a lot of psychological analysis on. You could do some really cool stuff with it."

If I Stay is showing in US cinemas now, and will debut on August 29 in the UK.

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