Originally from Llanfairpwll, Anglesey, Carwyn trained at the Guildhall School of Music and Drama, London. His theatre work includes 'Esther', 'Cysgod y Cryman', 'Y Gofalwr' (Theatr Genedlaethol Cymru), 'Silence' (RSC Fringe), 'Bitsh!', 'Johnny Delaeny' (Cwmni Fran Wen), 'O Gam i Gam' (Arad Goch), Madog (Cwmni Mega), 'Ma Bili'n Bwrw'r Bronco' (Theatr na nÓg/Wales Millennium Centre) and 'Halibalw, Hwyliau'n Codi' (Bara Caws). His television work includes 'Rownd a Rownd' (Ffilmiau'r Nant), 'Judge John Deed' (BBC) and 'Blodau a Sombreros' (Cwmni Da).