Glenn was born in Portadown, County Armagh, Northern Ireland. He was bitten by the acting bug whilst living in Dublin and after several years learning his trade, took the plunge and upped sticks to London, to pursue bigger things. Since relocating to London in 2007, he has worked extensively in all aspects of the acting industry, from well known TV shows like Dr Who and Stan Lee's Lucky Man, to appearing on the West End Stage as part of the original cast of Roddy Doyle's The Commitments. He continues to work in increasingly diverse and interesting character roles right across the acting spectrum.