It is rather unusual that the top candidates for a role like this are so far apart in age. Chloe Moretz is 15 years old and Haley Bennett is 24. Other actresses such as Dakota Fanning, Emily Browning, Bella Heathcote, and Lily Collins have read for Carrie. The Descendants star Shailene Woodley was reportedly offered the title role outright, but she passed.
Roberto Aguirre-Sacasa is writing the script for Kimberly Peirce to direct from, and our report from January revealed the writer wants to stay more faithful to author Stephen King's original novel. It isn't known when production may begin on Carrie.