The Kick-Ass actress, who is starring in the big screen remake of 1976 horror movie, was spotted on set in Toronto today wearing a black swimsuit.
The 15-year-old wore a robe over the bathing attire and had her hair pinned back under a hairnet as she prepared to film a pool scene.
The day before, she appeared to have perfectly morphed into the schoolgirl, who is dominated by her strict Christian mother, by wearing a rather demure green dress and crucifix necklace.
Chloe is managing to mix business with pleasure between takes and was spotted enjoying some down time with both her mother Teri, and her brother, Trevor.
The career-defining role of Carrie earned actress Sissy Spacek an Oscar nomination in 1977.
After The Descendants star Shailene Woodley turned it down, Chloë beat Dakota Fanning, Emily Browning, Lily Collins, and others to the juicy part.
It's not the first time the (500) Days of Summer star has played an outcast with supernatural abilities in a remake - Moretz played similar roles in this year's Dark Shadows and 2010's Let Me In.