[4][5] Bennett attended school in London, and on Saturdays went took drama classes at Stagecoach Performing Arts in Islington.
[6] Bennett began his career as a child actor, making his television debut in a 2010 episode of the ITV detective drama Foyle's War as a young version of Andrew Scott's character.
The following year, he played Simon Warner in the Channel 4 crime drama Kiri and made a guest appearance in an episode the Sky One comedy-drama Sick of It.
[3] In 2019 Bennett made his feature film debut with a small role in William Nicholson's drama Hope Gap.
[8] In September 2022, Bennett was cast as Peter Prior on the fourth season of the HBO anthology series True Detective, subtitled Night Country,[9] which premiered on 14 January 2024.