On television, he is known for his role in the ITVX teen drama Tell Me Everything (2022–2024).
[1][4] Fearn began his career with small roles in films such as Sweetheart, The Batman and Aftersun.
[6] In October 2022, he was cast in a television series adaptation of the Kazuo Ishiguro novel Never Let Me Go greenlit at FX,[7] however the series was cancelled before production began in February 2023.
[8] In 2024, Fearn appeared as Tyler James in the Amy Winehouse biopic Back to Black,[9] and in Alien: Romulus, an installment in the Alien franchise directed by Fede Álvarez.
[10] He is set to play a supporting role in James L. Brooks' upcoming film Ella McCay.