Chloë Grace Moretz’s transformation for her role in Greta showcased her dedication to portraying her character with depth and authenticity. Directed by Neil Jordan, Greta is a psychological thriller where Moretz plays Frances McCullen, a young woman drawn into a twisted friendship with an older woman, played by Isabelle Huppert. Moretz’s appearance shift was a crucial element in capturing Frances' vulnerability and naivety, which contrasts with the menacing undertones of the film.

To embody the character, Chloë Grace opted for a simpler, more innocent look, characterized by minimal makeup, soft features, and a wardrobe that emphasized her youth and trustworthiness. This aesthetic helped communicate Frances' susceptibility to manipulation, creating a stark visual contrast between her and Huppert’s more polished, sinister persona. Moretz’s hair was kept natural and slightly disheveled, adding to the impression of a young woman navigating unfamiliar and dangerous territory.

Beyond the physical transformation, Moretz delivered a performance that required subtle emotional shifts, from trust to fear, as her character realizes the danger posed by Greta. The changes in her appearance mirrored the psychological unraveling of Frances, enhancing the tension of the film. Critics praised Moretz’s ability to maintain an air of innocence while portraying the growing dread that defines her character's arc.

Overall, Chloë Grace Moretz’s changed look for Greta was not merely a cosmetic shift but a thoughtful decision that contributed to the film’s eerie atmosphere. It underscored Frances' evolution throughout the movie, as she transitions from a wide-eyed young woman to someone forced to confront the darker side of human nature.