"[We're] making it progressive for young women in this day and age," Moretz explained to ET at the KIIS-FM iHeartRadio Jingle Ball concert on Friday night.
So what does that mean for the classic character? Namely, there's going to be a big difference when it comes to hair color.
Moretz, who said that she had wanted to dye her hair bright red to match Disney's iconic mermaid Ariel, revealed that her film is going off of the Hans Christian Andersen novel. "So, I'll actually have blonde hair," she shared.
Despite the different take, Moretz said that she's very excited to bring this new version of the famous fable to the big screen, and recalled the elation she felt when she first found out she had been cast as the eponymous mermaid.
"When I got the call, I rolled the windows down in the car with my brother and we both screamed!" Moretz recounted. "It was a very exciting moment!"
While this new take on The Little Mermaid doesn't have a release date yet, Moretz will be appearing in a number of films over the next few months, including Neighbors 2: Sorority Rising and the young-adult action horror The 5th Wave.