Her parents encouraged her interest in acting while she grew up in Seattle, Washington. She started acting in local community productions at age eight.
She was born Chloe Celeste Hosterman. She is of French, Russian, and Hungarian descent. Her father Philip died when she was 15 and her mother's name is Bonnie. She has an older sister named Claire Hosterman. In April 2016, she got engaged to Ryan McCartan, but the couple called the wedding off in October of that year. In late 2016, she began dating Thomas Doherty; they parted ways in October 2020.