In television, he appeared in shows as Julian in Stath Lets Flats, Will_5000 in Sick Note, Simon in GameFace, Daniel in Turn Up Charlie and Voltaire in The Great (2020–2023).
[citation needed] Demri-Burns started his acting career when he played a minor character in the short film Nightswimming (2003).
His film credits include The Spy Who Dumped Me, Bridget Jones' Baby, The Brothers Grimsby and Kill Your Friends.
The same year, he also started in Abigail Blackmore's film Tales from the Lodge, alongside Kelly Wenham, Mackenzie Crook, Laura Fraser, Sophie Thompson and Johnny Vegas.
In 2020, he played the role of Voltaire in season 1 of the Hulu television series The Great, featuring Elle Fanning and Nicholas Hoult.