Taylor-Joy was born in Miami, Florida, the youngest of six children. Her mother is Spanish-English and her father is Scottish-Argentinian. Taylor-Joy has since lived in Argentina and the United Kingdom. She is a former ballet dancer. Her major breakthrough was her leading performance as Thomasin in Robert Eggers' critically acclaimed horror film The Witch, alongside Ralph Ineson and Kate Dickie. She also was the lead actress in the music video for Skrillex's remix of GTA's song Red Lips.