Raised in Caernarfon, north Wales, Llŷr Gwyn Lewis studied at Cardiff and Oxford, before completing a doctorate on the work of T. Gwynn Jones and W.B. Yeats. Following a period at Swansea University, he is now a lecturer at the School of Welsh at Cardiff University.
Rhyw Flodau Rhyfel (Some Flowers of War) is Llŷr's first work of fiction and won the Welsh language Wales Book of the Year award in 2015 for Creative Non-Fiction. His first poetry collection, Storm ar Wyneb yr Haul (Storm on the Face of the Sun) was published by Barddas in 2014.
He won the Urdd National Eisteddfod Chair in 2010 and 2011, and the Emyr Feddyg Scholarship in 2012.