Breaking through as a child actor in the 2017 hit horror film It in the iconic role of Georgie, Jackson would go on to land a leading role in the Hulu series Locke & Key.
He played little league baseball. His first professional role was as a guest star in a 2015 episode of Criminal Minds.
He attended a screening of It at the The Alamo Drafthouse in Phoenix, Arizona dressed as his character Georgie from the film.
He has a sister.
He starred alongside Jack Grazer in the 2017 adaptation of Stephen King's It.