Imrie has appeared in a range of stage, television and radio productions since he was a child. After his screen debut in the BBC One film drama Station Jim at the age of five, he appeared in the ITV drama series Kingdom in 2007, and the BBC One mini-series Restless in 2012. In the same year, he appeared in the BBC Two drama series The Hollow Crown, whilst in the following year, he appeared in the BBC One series Father Brown. Prior to attending LAMDA (2015—2017), he appeared at Shakespeare's Globe in London, playing Bagot in william Shakespeare's play Richard II (1595) and Ned Spiggett in Jessica Swale's play Nell Gwynn (2015). He has also appeared in a range of radio productions, including The Treasure Seekers, Charles Dickens' Great Expectations and John Mortimer's A Voyage Round My Father.