He played garage mechanic Nathan Cooper on ITV's long-running soap opera Coronation Street and voiced the centaur Firenze in the Wizarding World film series Harry Potter and Fantastic Beasts.

Fearon starred in Othello—opposite Gillian Kearney's Desdemona— in Liverpool at the age of 24, becoming the first black actor to play Othello on RSC main stages for over 40 years.

[1][2] His other early stage roles included Charles Surface in The School for Scandal; Betty/Martin in Cloud Nine; Longaville in Love's Labour's Lost; Ferdinand in The Tempest; and Pete in Blues for Mr Charlie.

He was the first black actor to play the title role in Othello in the main Royal Shakespeare theatre (director Michael Attenborough, 1999) giving a performance alongside Richard McCabe's strong and repressed Iago.

In 2004, he appeared in as Jean Kiyabe in World Music by Steve Waters at the Donmar Warehouse, and in the same year at the National Theatre as Mark in Sing Yer Hearts Out for the Lads by Roy Williams.