[4] He attended Bishop Challoner Catholic Secondary School and then Queen Mary's College for sixth form where he took A Levels in theatre studies, art photography, music technology and history.
[7] Harwood began his acting career in 2021, when he was cast to play the lead role of Jamie New / Mimi Me in the biographical coming-of-age musical comedy-drama film Everybody's Talking About Jamie,[8][9] which was released in select theatres in the United States on 10 September 2021,[10][11] followed by a worldwide streaming release on 17 September 2021 via Amazon Studios on Amazon Prime Video, for which he earned a 2021 Digital Spy Reader Awards for Rising Star – Film.
[15][16] Harwood was cast to play one of the lead role of Oliver in the horror comedy film The Loneliest Boy in the World alongside Hero Fiennes Tiffin, which was released on 14 October 2022.
[17][18][19][20][21] He also appeared in the shorts Seagull with Paul Cooper[22] and The Call with Adam Ali, David Ames and Oliver Wickham.
Harwood was announced as part of the cast of Dean Puckett's Magpie opposite Tuppence Middleton and Thomas Turgoose, playing David.