The Hugo actress, 15, will portray possessed teenager Carrie White in the chilling tale, taking on the part made famous by a young Sissy Spacek in director Brian De Palma's 1976 adaptation of the Stephen King novel.
Production on the forthcoming project doesn't begin until 1 June (12), but Moretz has been keeping busy creating her character's outfit to wear in the film's key prom scene, in which Carrie wreaks havoc with her supernatural powers.
She tells ETonline.com, ""I'm actually building my own dress and kind of going really deep into it, and I've never gone so deep into a role before.
""It's cool; it's a lot of work. Fun, but a lot of work.""
Moretz insists she won't be drawing inspiration for her look and performance from De Palma's film - because she's never seen it.
Speaking to ComingSoon.net, she says, ""I'm actually not looking at the original even though De Palma's movie was (considered) one of the best movies ever made. It's completely iconic and I'm proud to be able to be doing a retooling of it.""
But that doesn't mean she isn't doing her research: ""We're kind of going off the book. It's darker and much more psychological. More Black Swan. You're really looking into her mind and it really looks into the relationship of Margaret and Carrie. It's set in modern time, so it's a lot different.""
The remake will be directed by Kimberly Peirce and is set for a 2013 release. Julianne Moore is in negotiations to play Carrie's mum.