Dewi graduated from the Bristol Old Vic Theatre School in 2021. He has since been nominated for a Stage Debut award for his part in ‘Petula’, a co-production between Theatr Cymru, National Theatre Wales and August 012. He has also toured The Famous Five Musical with Chichester Festival Theatre and Theatr Clwyd, and featured as Puck in Southwark Playhouse's ‘A Midsummer Night’s Dream’. been part of the Theatr Clwyd and Theatr Cymru co-production ‘Wrecslam!’.

His television work includes The Sister Boniface Mysteries (BBC Studios), Y Goleudy (S4C/Boom Cymru), Bextra (S4C/Ceidiog), Mr Bates vs The Post Office (ITV/Little Gem), Beyond Paradise (BBC/Red Planet), Poll Pri (Delvrys/Film Hub South West) and The Lady (ITV/Leftbank)