2013–2019: Early work and recognition
Taylor-Joy made her acting debut in the 2014 fantasy comedy-horror Vampire Academy, but her scenes as a background "Feeder Girl" were dropped from the final cut. Her television debut was portraying Philippa Collins-Davidson in an episode of the detective drama series Endeavour. That was followed by a multi-episode arc in Atlantis, a 2015 fantasty-adventure drama series. Also in 2015, she starred in The Witch, a period horror film directed by Robert Eggers, about a Puritan family which encounters forces of evil in the woods near their New England farm. It premiered at the 2015 Sundance Film Festival to critical acclaim. The role was her breakthrough. Anthony Lane of The New Yorker called Taylor-Joy "remarkable in the role, her wide-eyed innocence entwined with a thread of cunning—proof either of her quick wits, scarcely unusual in a clever and curious girl, or of some fell purpose." She won the Gotham Independent Film Award for Breakthrough Actor and the Empire Award for Best Female Newcomer.
In 2016, Taylor-Joy starred in Luke Scott's science fiction horror film Morgan, playing the title character. It received negative reviews and was a commercial failure, but Booth Michigan's John Serba wrote that "Taylor-Joy disarms us with a performance that keenly teeter-totters between little-girl innocent and dead-eyed viciousness." She next starred in the drama film Barry, which focused on a young Barack Obama during his first year at Columbia University in 1981; it premiered at the 2016 Toronto International Film Festival.
In 2016, Taylor-Joy's likeness was licensed from Storm Management to represent the character of Valkyrie Cain on the tenth anniversary book cover of Skulduggery Pleasant, and subsequently the covers of the seventh, eighth, ninth, and fourteenth books in the series, before appearing in the music video for Skrillex's remix of GTA's song "Red Lips".
In 2016, she was cast opposite James McAvoy in M. Night Shyamalan's Split, where she played Casey Cooke, a teenage girl abducted by a man with multiple personalities (McAvoy). It was a commercial success, grossing $278.5 million on a budget of $9 million. Her next film that year was Cory Finley's directorial debut Thoroughbreds. It co-starred Olivia Cooke and Anton Yelchin in his final film role. Taylor-Joy played Lily, a high-school student who schemes to kill her stepfather via a contract with a drug dealer. It premiered at the 2017 Sundance Film Festival; David Ehrlich of IndieWire called her performance "captivating".
Her third release in 2017 was Sergio G. Sánchez's horror mystery Marrowbone; Tasha Robinson of The Verge wrote that Taylor-Joy brought "a shy, appealing warmth" to an inconsistent character. Taylor-Joy was nominated for the BAFTA Rising Star Award, and was awarded the Trophée Chopard at the Cannes Film Festival that year. In December 2017, she portrayed Petronella Oortman in the BBC One period drama miniseries The Miniaturist, based on Jessie Burton's novel of the same name. Taylor-Joy reprised her role as Casey Cooke in the 2019 psychological superhero film Glass, the final film in the Unbreakable film trilogy, appearing with McAvoy, Samuel L. Jackson and Sarah Paulson. It was a commercial success, grossing $247 million worldwide, Later that year, she appeared in the documentary film Love, Antosha, on the life and career of her late co-star Anton Yelchin; and in Hozier's music video for his song "Dinner & Diatribes".
Her next two 2019 films, the animated musical adventure film Playmobil: The Movie and biographical drama film Radioactive, were commercial failures. She also voiced the character of Brea in the fantasy series The Dark Crystal: Age of Resistance. In her final role of 2019, she played the starring role of Gina Gray in the BBC One period crime drama series Peaky Blinders.