Career
Born in Llangefni in Anglesey, Garmon is the son of the Welsh historian and novelist Richard Cyril Hughes. He obtained a degree in drama studies from Aberystwyth University. Although he is best known for Welsh language roles, he has also appeared on English language television, notably in Cadfael with Derek Jacobi.
He was a regular in the S4C soap opera Pobol y Cwm between 1997 and 2004, in the role of Steffan Humphries.
In 2010 he joined the academic staff of Glyndwr University.